I found a used PRS tailpiece yesterday for $20. The seller claims it's an original aluminum PRS with nickel plating and it looks exactly like the one I need. We'll see. The guitar should arrive next week. I also picked up a set of Schaller tuners, made in Germany, that should be exact replacements for the locking tuners on the PRS. Should be able to install them in the original holes and use the original screw holes. I'm just hoping the frets are in decent shape. The seller says they are.