I have just bought a Tekin 410K off ebay, arrived yesterday, looking a bit tatty but heck, its supposedly working!!!
This is pre RC10B2, so about the time of the last of the alloy tub RC10's and Procats, early Bosscats when the 410K was used and, erm, failing..
although awesome when working.
Bizarre how big it looks now, ive seen smaller BigMac's.