I think the unavailability of this item is just bad luck and bad timing. I think EMS had the clearing out these sweaters (for $99!) even before the BPL review was posted. The EMS employees I talked to said they assume the stores will get a new batch of Ascent Sector sweaters.
I got lucky. Lightweight insulation was a weak spot in my kit, so I read the review, searched EMS, saw the sale and tried to order a Large, but I got a message saying that size was "temporarily unavailable." That, of course, made me REALLY want one. I e-mailed EMS to ask if "temporarily unavailable" meant "sold out" or "try again in a few minutes." I got a prompt response the message means "sold out" and suggesting I call their customer service number to see if any of the brick and mortar stores still had my size. Which I did. A nice young lady thought she found one, but when she called the store -- no luck. Oh well. Five minutes later, she called back. A store employee had found the sweater in the back room.
Buying from a store, I didn't get the web site's free-shipping deal, but hey, it's lightweight and pretty cheap to ship!
It arrived yesterday. Seems to fit well (I'm just under 6'3"). Like I said. I feel like I got lucky.