Just a FYI, Four Seasons also has a good sized pile of the GSG-5 10-round mags in stock... I just bought one yesterday, since I figure this mag may be hard to find by mail order -- most states allow the 22 rounds and the gun is a bit obscure, so not sure how common this mag is in 10 rounds.
(The 10 round mag is just a 22 round mag with something in it to block the plate from moving all the way. This means you can probably remove it after you have completed your move to a free state, and then have normal 22 round mags.)