If you like the lightweight of plastic, but want metal instead, I'd recommend Caspian Arms Aluminum ms h. They come in all options, depending on what you want....Al, Steel, checkered, even blank if you want to stipple it. I don't have the link or phone # handy, but you can order it direct. Brownells carries some of their parts too. They might have it.
"But now, he that hath a purse, let him take it, and likewise his scrip; and he that hath no sword, let him sell his garment, and buy one." -Jesus Christ (Luke 22:36, see John 3:15-18)