You'll have to search, but there was a recent thread about bolt-on cogs where peeps were riding with canti's on the rear because you eliminate the ability to use the disc (obviously). Seems that any traditional frame with studs on the rear would work.

I took a moment, feeling friendly, and remembered the name of the company. Velosolo.

My always preference on non-racing wheels are salsa delgado hubs laced to surly new hubs (pretty much the stock buildup for Surly Karate Monkey). I run them on my KM and my Fixed-gear Diablo (Handsom Devil).

Jaytron, oddly, they do exist.