Actually, I would think they did. All cars sold up here in Canada have DRLs. Its the law. My 2005 Mustang has DRLs. As all Mustangs come out of the same plant I would think that your dealer should be able to get the DRL module. I'm sure there are other members who might be able to give you more specific info.
edit: I was checking my repair manual to see if I could get you a part #. It appears that the DRLs are programmed as part of the Smart Junction Box. The repair manual states that the DRLs can be re-programmed through the SJB on vehs originally equipped with this feature. I could find no reference to another part, so hopefully someone with a little more knowledge than I will speak up to help you out.