Bob, I bought it from a fellow member of the board. His name is John Kelly, here is his website http://www.ghiaspecialties.com/
It was around 55-60 bucks including shipping.
Yes its the first time am trying out the shrinking disc. Ive been playing around with a poor man's version for some time and the results are excellent.
It has cut my repair time down!! On smaller dents or dents that I have access to on the backside I can metal finish most of them. On bigger dents where before I had to do a coat or filler like Rage Gold then skim coat of poly glaze, am able to get by with just the poly glaze.
Am really looking forward to using this shrinking disc