56cm Redline SS frameset, with a few extra bits (stem, bars, brakes, levers, seatpost) if you want 'em.
The Raleigh Twin Six frame is available directly from Twin Six: http://www.twinsix.com/gear/mens-casual/twin-six-ss-cx-frameset-new
That can optionally include a stellar deal on the Gates CenterTrack parts. That's where I got mine, thanks to a killer team discount. (Being part of Team Twin Six has its perks.)
Kit - That is a smoking deal for the Gates bits. Price has been the only thing holding me back from going belt drive on my SS. If anyone happens to buy one of the Twin Six framesets but doesn't want to do the belt drive, please ping me. I'd gladly cover the $150 upcharge.
maybe a dumb question, but do the gates cogs work on standard flip-flop hubs or road hubs?
They slide on just like a cassette would, so you need a standard road/mtb cassette hub, not a threaded flip/flop.