Doesn't really answer the question, but if it was me, I'd just build one. I'd probably try to get Craddock to spin up a Rock Creek 223 Wylde barrel for 400-450 bucks or so, buy an Aero Enhanced upper and handguard for about 300, look around for a deal on a Toolcraft bolt carrier group, and grab whatever gas block and tube caught my eye. A cheap milspec charging handle is like 20 bucks.
Probably would have less than 900 bucks in that setup, even with shipping, and the odds of it shooting good would be high.
