Excellent intel, thanks! Yeah, they do like those GTs in the UK. I see one on eBay right now going for $89 +110 shipping. 'Course, we're keeping it in any event.
As for the shifters, I think I'll keep them. Only issue is the front. From the large chainring, when I hit the small trigger it wants to jump all the way to the small chainring, and not stop in the middle. I'm guessing it's just a pawl not catching. I'll open it up one more time and free it up some more.