I would try calling around the various Rad physical store locations, trying to talk to a mechanic on-site, preferably a supervisor. Explain the problem to somebody who handles and deals with Rad frames all day - I bet one or more stores has a frame sitting in a corner somewhere, or knows how to find one.
The main phone-number CSRs can only access what's available on the parts computer in front of their nose. Shops collect all sorts of odds and ends that never get entered anywhere, but are too worthwhile to just throw away.
If I heard your story as described above, was working in a Rad shop and cared about customer service the way the company claims to do; I'd figure out a way to get one sent to you at an agreeable price.
Good luck.