I bought most of my stuff I needed for my Capri from Niagara Cycle Works. They had free shipping over a certain dollar amount spent. Check around on the net for the best deals you can get at the time. I also bought some track wheels from bicyclewheels.com and a cog and chain from the Trek Store of St Louis.
I ended up buying a crank set, pedals, chainring, brake pads, brake cables, chain, cog, freewheel, wheel set with a flip flop hub, tires, tubes, handlebar tape, and a seat.
The bike turned out real nice. All I need now is a better set of handlebars.