Forgot wallet encryption password, are any brute force tools available? I have an idea of what my password should be, but am missing something.

Are there any tools or bash scripts to brute force my wallet passwords?  

If a dictionary is required, I can pre seed it as necessary (but if I pre-seed a dictionary with my expected passwords that utility better be FOSS so I can review the source ;)  )
There is a script provided by a forum user Revalin which can be used to attempt variations.  There is a forum user Rix who may be available for hire to provide assistance with this type of problem.

You can also try out this script:
https://bitcointalk.org/index.php?topic=170694.0