Hi, I've got the same problem with a very old Rox Shox Reba. Best option I could find so far without having to go to the LBS is the following: http://www.chainreactioncycles.com/Categories.aspx?CategoryID=563 There's quite a variety, so I guess one woud just have to scrounge around and try and find one that works. I'm planning to order one that might allow me to keep the rotor at 160mm since I'm not sure the wheel I've got can accommodate a 180mm. Hope you come right. Cheers.