MPB Quik Shok still available?

They were available in .22LR and 12 Gauge slug (Rifled and sabot both, IIRC). Not on the dealer's shelves anymore and my search on the net, well I finally gave up. I never have used these in either chambering (I wanted to pick some 12 ga. up but never got around to it. Well my parents are moving into town so my dad returned my old Mossberg 500 (American Field grade, 24" Rifled) and his Marlin model 60.Feels good to finally have guns again. Anyway I was hoping to score some of this ammo for my new firearms. If anyone knows of a source or has info, please advise, thanks.

BTW also any info on CCI Velocitor, how does it compare to Stingers (I already have a 550 rd. box of Winchester, but I always like to have a supply of high performance stuff regardless of cartridge)