It appears that most of the sites on the internet are sold out and I'm sure they won't be having any more soon if ever. There is one site still selling them but they keep raising the price. 2 days ago a 30 round Magpul was going for $15.99, yesterday for $29.99 and today for $33.99. If they still have any left I wonder what the price will be tomorrow.
MAGPUL PMAG 30 Round MAG311-BLK In Stock, Best Prices at Surplus Ammo & Arms