I have a few sets of these if anyone needs them. I only have the chassis screwsets for two of the three, though. First come, first served! Thanks! 1. 400rb, early series, rackmount holes have been expanded (see pic), $27 PP/shipped. 2. Same era 400rb mounts w/chrome handles, $34 PP/shipped. 3. 800rb rackmounts, $30.