If they are sold through QBP, any bike shop pretty much can order them up for you. However, if they are not listed as in stock through any of those online QBP vendors (aebike, airbomb, etc) that means that Quality, the supplier, is out. And they're a pretty big (the biggest, I would imagine) supplier of Alex rims.
We have the BIG QBP book at work, and a lot of the stuff they have listed in it they don't have in stock - the quickest way for even ME to check is to go on aebike.com.
I would start poking around on ebay or look for other rim options, sorry to say.