If your talking about the program it is installed with NX. It can be found in start menu in the siemens folder under the manufacturing folder. It should point to this file here C:\Program Files\Siemens\NX 8.0\POSTBUILD\post_builder.ba
If your talking about the actual post files then NX comes with standard ones. If you want anymore then you can download some from Siemens, Pay for them or Create you own.
Or are you saying it is broke and you would like one that actually works?
Production: NX10.0.3.5 MP16/TC11.2
I'd rather be e-steamed than e-diseaseled