Nova Cycles supplies tubing and all the little necessaries for framebuilding. They don't sell the add-on parts. And they don't put 'em together. Most of the "good" add on parts are available direct from the maker. The imported stuff you'll need to establish a wholesale account with an importer or-- simply buy from discount retailers.

Of course most builders will build your bike after they make the frame with components you or they supply. And many of them will offer you numerous tubing options, but some only deal with one or two tubing makers. So if you have your heart set on Tange and the maker only uses True Temper...well.

Hey, some places do a full build-up pricing--wrench science? Just take out their non-custom frame and insert the cost of yours...