I'ts an old Power Wah Fuzz (70's Tel-Ray product)
I have a Power Wah boost now and it comes close to the sound I'm after, but just not close enough.
Watching one on ebay now also, so I might not need any help afterall...
Edit: Seems like I've got the one from ebay :-)
(Message edited by fc_spoiler on October 28, 2008)