I have a 650 C Paramount frame coming from Ebay (OK, OK, but it was a good deal...). Does anyone have any experience with getting a set of 650 C fixed gear wheels? I know I could custom order or build myself from new parts, but am looking for other options--what i would prefer is a flip flop hub with one freewheel side..OK, I know that's not pure. Anyone else solved this problem for me?