I bought mags from Joe's 1911 Mag Mania on the Internet. I use a 1911 Remington R1 and the mags i purchased from Joe's are shown as 1911 7 round Hybrid Stainless Steel Mags. His website shows 5 Mags @ $55.00. I have used them and they are good mags they list at $12.00 each, but if you buy 5 you get a $5.00 less break. He ships them fast USP. Here is a link to his website for those interested:
http://www.joes1911magmania.com/1911-7-round-hybrid-stainless-maga19117.html