Most websites still list Enforcer, though, out of stock. The only Ramshot powders I see listing in-stock are Silhouette, Tac, Zip, and once in a while, True Blue.
As for AA 4100, it seems as scarce as AA #2. While Accurate's rifle powders are most generally on the shelves. It has only been in the last couple or so of months that #5, #7, and #9 have shown up. Hopefully, we'll be seeing the 4100 and #2 show up soon.
BTW, I just looked through Western Powders website, they're still listing 4100 and Enforcer in their powder line-up.