Sportsmansguide is clearing out Radway Green mags for $15.00 a pop. Haven't ever tried these and can't comment on 'em but thought I'd pass this info on for anyone interested. It's an e-mail special so you may have to use this link to get the good price.
You can get better mags right here for the same price.... www.eaglefirearms.net/ar15_magazines.htm
Edit: I shouldn't say they are better than the mags you're talking about because I haven't had any experience with Radway Green magazines....Sorry.
D&H Industries Teflon coated 30 round magazines
These are new gray Teflon coated USGI spec. 30 round aluminum magazines. These have the milspec updated green follower. These are made to the original military specifications and then Teflon coated for improved finish durability, they won't scratch up as easy as a dry film magazine. These are excellent quality magazines and are used by many OEM suppliers including Bushmaster.
These magazines have "LEO" markings on the floorplate.