I put a set together recently and of course ended up with a few spares! It really does make the bike look that little bit more special. You can see the end result of mine here on page 4.
Anyway I have a spare pair of calipers and a rear deraileur if you are interested. They are actually the ones on the bike in the pictures as I have sourced even better ones since finishing the build. Both very good condition, calipers with just a little rust that you will probably be able to remove.
£40 posted for both, or £20 posted for one or the other if you want them.