I don't know of anyone that I could send you to. Are you anywhere near Hendricks, he owns the snake skinner car so I would think he might have some one familiar with an LT5 on his staff. That's just a shot in the dark on my part.
However if you are inclined to want to do this yourself we are standing at the ready to render any assistance we are able to thru this forum. If you were a bit closer I'd just drive over with my stuff and we could see what's up. Are there any other Z Brothers near you?
Also forgot this. I never actually found the reason for my car giving me the DTC 31. I noticed one thing that was consistent about the episode though. It seemed that if I altered the way I start my car I could avoid getting that DTC. Yes, weird right? I learned to not be in a hurry when starting her. Now I turn the key to "on" and light up the DIC, wait till most of the lights go off, and then go to "start". When I wasn't doing that I would get the 31. Yea I know I should pull the cam sensor and look at the face or just buy a new one. I'll get around to it eventually I guess.
Tom