I've seen a couple of ads for the magazines on Gunbroker, and Earl's advertises them also. I have no idea if any of these guys have the magazines in stock yet.
I do know that the week this site started, Gunbroker did kick a dealer off their website who was advertising both calibers, but who did not have the guns in inventory. I know because I sent the "seller" an email and he replied that I should get on his waiting list for when the pistols arrived.
He was from someplace in GA.
I was happy to see they banned the guy. I thought of emailing them and complaining, but I didn't. Evidentally, some other folks complained.