Aluma-Hyde is your best bet. More expensive than regular spray paint though.
Yes, they make a specific magpul FDE color.
I believe you can buy aresol duracoat in a magpul FDE.
Aervoe Coyote is really close.
I was told that Rustoleum "Painters Touch" Satin Nutmeg was close, which it is, but what some terrible paint. Dont waste your time or money. Mine just ran and pooled up and I was holding the can 16" back giving it light quick coats. It just sprays to thick.