There's always the option of buying in-stock merchandise from a third-party retailer like Brownells, though likely at higher cost than Aero's sales (especially their Nov-Dec sales).
Lack of response to phone or email queries is unsat regardless of time of year.
I originally had one in my cart from Brownells and then decided as long as I was getting a barrel (or two) from them I'd just get it all from them. Then Brownells was all out of stock and the rest is a history of waiting. Don't know why my undies are in a bunch...when is the last time any of us ordered a barrel from McGowen or the sort and got it back in less than two months? I guess with the barrel you know it's being made to order. Get spoiled with places like Brownells, Midway, etc where sometimes what you order gets shipped the same day.