I bought a set from Oriellys they have a lifetime warranty and yes they are made in China. They were $69 ea and required no cores. They have been on the vehicle for only 2 months but no issues so far.
I took the factory Toyota ones to a local rebuild shop thats all they do is axles and driveshafts, they have a very good reputation. Other than the broken boots he said they looked great for such high mileage but he rebuilt them anyway($140 for both). They are sitting in the boxes waiting for the Chinese ones to go out but like a said no issues so far.
BTW toyota axles if im not mistaken are like $400 from the dealer...i dont think id go that route...