Right now, as far as I know, the only guns available are the Ruger SP-101 and the Charter Arms Undercover. The Rugers are pretty scarce but some are out there. The ammo is pretty scarce as well but is showing up more now. If things catch on both guns and ammo will become more available just like every other round. New cartridges always take off to a few bumps in production but it eventually smooths out.
I'm looking forward to trying it out as soon as my gun arrives. With the ability to shoot .32 Shorts,Long, H&R Mag, Fed Mag, and even acp will be a very cool platform.