Have you talked with Festool Service directly?
Contact information is in the first post of MFS: Notes on the MFS
Yes, I have, Ned. After posing my question, the person on the other end of the line said he would investigate and call me back. When he called back, he basically said that they don't have a way of providing those parts separately yet in the US. (I would suspect that if a warrantee repair or replacement was involved, some exceptional means would be found.)
I went back to your post on the 'MFS: Notes on the MFS' from January and in your reply of March 27, 2007 you wrote:
4. In Europe, 200, 400, and 700 rails are sold separately. We should encourage Festool USA to make them available in NA.