Before I got my gti, I was planning to get a 2.0 gt tdi (basic grill) and put the gt tdi front bumper/grill on aswell as an r32 diffuser and exhaust.
It's not the hardest job in the world, you can do the bumper yourself and any local exhaust garage should be able to make up a pipe for the backbox.
Failing that I think there are companies who make r32 back boxes for the diesels.