Have you lurked around on ebay? I recently scored a very nice Picatinny scope rail for my M1A for $25. When it arrived it seemed to be a first edition of the rail because I needed to do some slight machining of the clip bracket so the bolt would rotate up and out. But, once I had that figured out I'm very happy with the mount - especially the price. I called Springfield about it and the gent confirmed that earlier versions prevented the bolt removal - so I went ahead and cut mine back.
