Possible dulicate of Java + Maven1.x : how to add sun's tools.jar? .
No matter the project size, I strongly recommend scheduling the time to migrate from Maven 1.x to Maven 3. (Do not even consider moving to Maven 2, as that would not make much sense). I do understand you. I have had to carry out large migrations (200-400 modules in both companies I did it for) from Ant to Maven 2.x and from Maven 1.x to Maven 2.x. My point here is that Maven 1.x has reached it's end of life some 2-3 years ago (possibly even more). There are few people who would be glad to help you with Jelly-based messes and you'll sink deeper.
You can try adding the tools.jar as a dependency of your project:
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>1.4.2</version>
<scope>system</scope>
<systemPath>${java.home}/../lib/tools.jar</systemPath>
<properties>
<eclipse.dependency>true</eclipse.dependency>
</properties>
</dependency>
If the old documentation pages weren't deprecated, I would have had a look and would have probably been of more help. Tell you "stakeholders" to think about which year it is. Technologies expire and need updating. Obviously, for the creators of certain software to decide to expire it and ask you to upgrade to something newer, they ought to have a really good reason such as -- it's not as good as it should be and they have something better for you.
Have a look here and here. Hopefully, you'll be able to figure it out.