Both of my P6's came with two mags. Gander even gave me a third with the last one for free.
I've also bought a couple of the new ones off Top Gun Supply. As advertised, new SIG mags.(although it appears they have gone up in price, I paid $29 a mag for mine) They are great people to deal with. They will email you on an item your interested in when its out of stock, when it comes in. I got a couple of Milt Sparks VMII's off them that way.(they also seem to have them on a regular basis, even though they sell out quick)