Where can I find BCEL 6.0 and how can I modify it adding a patch?

Where can I find BCEL 6.0 and how can I modify it adding a patch?

I used for my project BCEL-5.2 and after few months I realized that it
doesn't contain the class for the local variable type table. I saw that is
present in BCEL-6.0 and I found also a patch to apply at it.
Where can I find the source code of this library?
Anybody know how to get the library after adding the patch?