had a similar problem, except I lost the spacers, so I cut up some 38mm sink waste plastic tubing to fit. not pretty but it works.I have solved (I think) the chain clearance issue on the smallest sprocket by fitting a washer between the lock ring and the dropout. Next conundrum is to work out how to fit the now-refurbished front derailleur I was kindly given as a freebie onto the seat tube as the clamp is just that little bit too big, and the metal spacers that came with it won't stay put. I predict I will be having some fun with glue and sections of old inner tube...
Enjoying reading your adventures with the bike and the cats
john




Some old inner tube did the trick. Along with aforementioned double-sided sticky tape. It's going to be my winter bike, so practicality wins over aesthetics every time.
Besides, when it's covered in mud, who is going to know? 
and the very last shortbread finger. I think I earned that. 