I have a DHP powertuner so I could help you out, depending on what you want done. Only thing is I wouldn't be able to do it for a while either. I'm rebuilding my engine at the moment myself, and getting ready to move, so things are crazy.

I feel your pain though. It is hard to find people with experience tuning GM v6's. That's why I ended up just getting a tuner and learning to do it myself. It's definitely not a fast or easy process though. Good luck though, and if you can't find anyone and still need help shoot me a PM sometime and I'll see what I can do.