So I spoke with a longtime client/friend of mine who also is on this board. Don Lewis from Don's Automotive here in Austin, TX. He searched in vain for a replacement as well as called in a favor or 2 at the Ford dealer, but they too are coming up empty as it's been discontinued and they can't locate any. Don did have a great idea, however, and that was to go to Car-Part.com--Used Auto Parts Market I made a few calls, and while I haven;t yet secured a new left rear power window regulator, I'm optimistic that it's a matter of time before I do. I'll keep you guys posted, and again, thanks for the help.