wanted: sources for new toolchanger mechanisms

Who knows some good sources for new toolchanger
mechanisms? Any experiences doing retrofits?

I have two applications in mind:
- 4 to 8 mini-collet toolchanger for a cnc router

- 8 to 20 position changer (40 taper) for Bridgeport type mills

While I'm at it, who knows the URL for the (German ?)
Perske spindle manufacturer and the (Italian ?) Columbo
spindle manufacturer?

Doug Fortune
http://www.cncKITS.com