Just Testors enamel paint available most anywhere. Ace Hardware had what I needed. On the Dark Earth glocks on other forums I saw a gentleman mention using dark tan so I did the same. The color is a mismatch with the Dark Earth Glock. I was going to add some dark olive to the dark tan to darken it some, or even some black, but the contrast in color looks pretty good. It's not a colormatch, but neither are the Vickers magazine baseplates to the DE glock frames.
Now I'm on a new mission to colormatch some kydex for a holster to the frame. I went to Lowe's and got some paint color swatches, matched it perfectly to my Glock and sent it to Knifekits.com. They called me back and informed me what I had already guessed, it's somewhere between their Coyote brown and their Chocolate brown, with the latter being closer.