I'm not aware of any VMWare version that will allow you to run your AIX programs on LINUX.
You might want to check AIX 5L which claimed to be able to run your Linux programs.

: Is there a VMWare version, or some other software that will allow AIX and Linux to co-exist on the same PC? We are currently moving some applications onto Linux, and would like to be able to run our AIX apps at the same time on the same machine.