I just found this Dirkson's Tremconverter in a box of parts. I have never used it. I probably bought it around 2006 from Stew Mac. Looks like this:
http://digital.premierguitar.com/premierguitar/201005_1?pg=141#pg141
$55 shipped in the US. It comes with a special wire clip for a Wilkinson Trem. I have no idea if it will fit any other trems.
http://digital.premierguitar.com/premierguitar/201005_1?pg=141#pg141
$55 shipped in the US. It comes with a special wire clip for a Wilkinson Trem. I have no idea if it will fit any other trems.