Borrow a set of Crye pants (or repros) from a friend, get the BDU you want, bring both to a local seamstress, add a bit of money to the mix... AND VOILĂ€!
R3CON1 here in Quebec did that. And he added an UnderArmor-type t-shirt to that combo (for the stretch material), and got out with awesomely done set of "Crye" DPM pants