I have a few used ones with ranger plates. I don't want to sell them though because I'd be in the same boat as you trying to replace them...in fact I am sorta paddling along side looking for od but no rush, I'll just wait till they hit the shelves again. I have an array of ARs with different color furniture and what works well is to blend green, brown, tan and a little black here and there to darken the green...krylon fusion spray paint. spray streaks and/or blotch with a sponge into a camo pattern ...till they match your rifles regardless of furniture colors. I've done this to too many though. I didn't save any in plain black lol...but I'm mostly switching to troy mags anyway and other than stenciling little dragons and scorpions, they are all still black.
It seems like the black PMAGs are available everywhere these days but the other colors are impossible to find. I'm sure they produced a lot more of them in black because that is the most common color but FDE shouldn't be very far behind in popularity. The only place I've seen one recently was on an AR15 rifle with the Magpul FDE furniture kit.
I have been buying & selling firearms, ammo, and accessories locally and on Gunbroker for several years. I will send you a PM if I find any FDE mags.