You have two choices in front of you; leave this place now, and forget you were ever here, or embrace RetroBiking and resign yourself to the fact that within six months you will have more bikes, frames and parts than you ever thought humanly possible, and you will be broke.
As for chainrings; ebay is pretty good, with plenty of traders selling NOS, Tweeks and UK Bike Store have good selections in all sorts of BCD's and at good prices, and Chain Reaction often have silly sales where certain parts can be picked up for next to nothing, oh and Malcolm at The Cycle Clinic is pretty good and is a forum member (he has a web site, shop and ebay shop, so is not hard to find).
Also, there are a few RB folks in your neck of the woods. Look at the area groups section and you'll find a rowdy group of retrobates (see what I did there?), who will be only too pleased to meet up, outride you and leave you in a panting heap half way around a ride.
"Try not to punch any clowns"