I tried a lot of different drivers and modifications to those drivers. It was eventually a driver installer I found on Amazon's website that worked for me. I just installed it on top of my other Kindle Fire WinUsb driver installation.
https://s3.amazonaws.com/android-sdk-manager/redist/kindle_fire_usb_driver.zip
Below is my android_winusb.inf after the install.
;======= Kindle Fire WinUsb driver installation. =====================
[Version]
Signature = "$Windows NT$"
Class = KindleFireUsbDeviceClass
ClassGuid = {6f75a202-3dc3-4dba-97bc-2af2832b5a73}
Provider = %ManufacturerName%
DriverVer = 10/27/2014,1.4.0000.00000
CatalogFile.NTx86 = kindlefirewinusbx86.cat
CatalogFile.NTamd64 = kindlefirewinusba64.cat
;======= Class section =================================================
[ClassInstall32]
Addreg = AndroidWinUsbClassReg
[AndroidWinUsbClassReg]
HKR,,,0,%ClassName%
HKR,,Icon,,-1
;========= Device section ==============================================
[Manufacturer]
%ManufacturerName% = Amazon, NTx86, NTamd64
[Amazon.NTx86]
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0006&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0008&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000A&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0007&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000B&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000C&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000D&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0800&MI_01
%SingleAdbInterface% = USB_Install, USB\VID_1949&PID_00F0
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_00F2&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_00F4&MI_01
%SingleAdbInterface% = USB_Install, USB\VID_1949&PID_0120
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0122&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0124&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0012&MI_01
; For 64-bit os
[Amazon.NTamd64]
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0006&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0008&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000A&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0007&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000B&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000C&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_000D&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0800&MI_01
%SingleAdbInterface% = USB_Install, USB\VID_1949&PID_00F0
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_00F2&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_00F4&MI_01
%SingleAdbInterface% = USB_Install, USB\VID_1949&PID_0120
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0122&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0124&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_1949&PID_0012&MI_01
;======================================================================
[USB_Install]
Include = winusb.inf
Needs = WINUSB.NT
[USB_Install.Services]
Include = winusb.inf
AddService = WinUSB,0x00000002,WinUSB_ServiceInstall
[WinUSB_ServiceInstall]
DisplayName = %WinUSB_SvcDesc%
ServiceType = 1
StartType = 3
ErrorControl = 1
ServiceBinary = %12%\WinUSB.sys
[USB_Install.Wdf]
KmdfService = WINUSB, WinUSB_Install
[WinUSB_Install]
KmdfLibraryVersion = 1.9
[USB_Install.HW]
AddReg = Dev_AddReg
[Dev_AddReg]
HKR,,DeviceInterfaceGUIDs,0x10000,"{F72FE0D4-CBCB-407d-8814-9ED673D0DD6B}"
[USB_Install.CoInstallers]
AddReg = CoInstallers_AddReg
CopyFiles = CoInstallers_CopyFiles
[CoInstallers_AddReg]
HKR,,CoInstallers32,0x00010000,"WdfCoInstaller01009.dll,WdfCoInstaller","WinUSBCoInstaller2.dll"
[CoInstallers_CopyFiles]
WinUSBCoInstaller2.dll
WdfCoInstaller01009.dll
[DestinationDirs]
CoInstallers_CopyFiles=11
;============== Source Media Section ================================================
[SourceDisksNames]
1 = %DISK_NAME%,,,\i386
2 = %DISK_NAME%,,,\amd64
[SourceDisksFiles.x86]
WinUSBCoInstaller2.dll = 1
WdfCoInstaller01009.dll = 1
[SourceDisksFiles.amd64]
WinUSBCoInstaller2.dll = 2
WdfCoInstaller01009.dll = 2
;======================= Strings ====================================================
[Strings]
ManufacturerName = "Amazon.com"
CompositeAdbInterface = "Android Composite ADB Interface"
SingleAdbInterface = "Android ADB Interface"
SingleBootLoaderInterface = "Android Bootloader Interface"
WinUSB_SvcDesc = "Android USB Driver"
DISK_NAME = "Android WinUsb Installation Disk"
ClassName = "Kindle Fire"