Anyone know of a source for either factory or aftermarket polymer/plastic slide cover plates in other colors? I have a Glock 21 with a 21 slide and a 20 slide. I want to differentiate the two slides more easily. I thought about getting a different color cover plate, but they all seem to be aluminum, and I’ve seen posts where Glock armorers don’t like them because of plastic hitting the metal cover. So, just to be safe, I’d like to have a polymer/plastic cover plate but can’t seem to find any in colors other than black. Does anyone know of any? Do the Glocks that come in different colors have matching cover plates? Or are they black?