If you're still looking for a frame, check out Freeride, the local co-op. They have plenty of old steel frames that you could get for a pretty low cost. What size frame are you looking for? I might have one or two that would work for you myself.
Also, one of the beauties of steel is that the spacing can be easily changed. Check out Sheldon Brown's (RIP) page on "cold setting." Most older frames you find will be 120 and some will be 126. That isn't hard to change to 130 (the common modern road standard, which is what modern freehub wheels are spaced at.) Likewise, if you have a 126 or 130mm frame, respacing it to 120 for a track hub is not difficult.