Take a close look at "Luigi", the guy driving the truck with both Archer's before the final showdown. I'm pretty sure that it is Archer in a fake moustache and truckers cap.

Everyone! Before the Archer's confront Veronica Dean, pay close attention to "Luigi" (the guy driving the truck), it's clearly Archer wearing a fake moustache and a truckers cap. Who knows, Krieger has more than one cyborg of himself, maybe he had multiple Archer's as well.