OK here it is. I know of a site that has Pmags in stock right now. I just ordered some. In fact they have a lot of magazines in stock too. They have both 20 and 30 round Pmags.
http://magsllc.com/shopdisplayproducts.asp?id=31&cat=PMags
Oh yeah here are some more Pmags: Black and OD green Maglevel Pmags
http://magsllc.com/shopdisplayproducts.asp?id=31&cat=PMags
Oh yeah here are some more Pmags: Black and OD green Maglevel Pmags