Need SBP Disc Brakes

The front suspension of my '65 Dart is apart for new bushings, so an opportune time to switch to Kelsey-Hayes disc brakes. I am staying small (bought SBP Cragar wheels).

I find every part but hubs. Is the disc hub different than the drum hub? Spindles are on ebay for $75/pr and calipers are easy. Carquest claims to have rotors but is dropping the Bimbo line in the warehouse in a few weeks. If I know I can move forward with discs, I will grab 4.

Does anybody have 2 hubs or hub/rotors they will sell? I will pay up to $100 for a pair of hubs. A complete rebuildable system would be of interest too (don't need MC). I want to stay under $400 after rebuild, otherwise I'll re-assemble w/ 10" drum brakes.

Also, ebay listing 200219746065
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=200219746065
is a K-H hub/rotor PN 14507 ($50, ends 5-22-09). It looks a little like Mopar, but googling the PN brings nothing. Seller is a warehouse liquidator that knows nothing and won't measure. If anybody knows the Mopar PN, please reply or buy it if you need it. Previously, they showed a PN 14535 that sold.