Yes, they have, but you can look at gunbroker.com or auctionarms.com or even gunsamerica.com.
Remington has replaced their ADL with a new model which seems improved over the ADL. I say "seems" because I have not handled this new model. I forget the new model name, but you can go to the Remington website and check it out.
Still, if your heart is set on an ADL, then check out the sites I mentioned.
Zachary