Ive got a black aluminum on off valve <like 6 of them or 8 or something> they are push button and pretty cool looking, brand new. Picked them up but ended up not needing them. If they turn out bad il buy them all back..but i dont think they will. If your interested in a bunch i can make you a deal..if you want one..it will still be cheap. PM me or email whatever all my info is avail through here.
Oh and they are valves, not ASA adapters or whatever..they thread into the tank.