Sportsmans warehouse in Loveland CO has some ProMags (poly) AR15 mags in stock, 10 & 15 rounders if I read them right as well as 1 ak47 mag left...got one of them for my kids AK.
Ran about $15 for any of them.
Guys, I don't know if this has been posted yet but here you go: www.arpartsfinder.com enjoy yourselves and don't blow all your credit cards in one place.