I like the OD ones as well. Topglock.com sells them. I see them on gunbroker now and then.
Personally, I'm waiting and hoping for a G20 SF. If they can do the SF thing to the G21, then surely the same thing is going to happen to the G20! Which will probably mean different mags just like for the .45. So I'm holding off until such a critter is introduced. If they make it, I'll buy it!
Gregg