Auggies Games used to sell some, and they still have a few up for sale, but I haven't seen any of the heroes in a while and there are very few monsters now. I guess they're not going to restock them anytime soon:
My understanding is that Auggie's "restocking" procedure is to buy Descent 1e boxes, open them up and sell all the bits individually. I expect at this point that the cost involved in getting more 1e boxes to open up would far outweigh any revenue they stand to make from selling the few profitable bits inside.
In short, no, I don't expect they'll be restocking anything 1e that's sold out now.