Wolf Performance Ammunition is bringing in Type 91 uppers and completing them with US made barrels. The Type 91 is the standard issue service rifle for the Taiwanese Army. It is gas piston operated but lacks a forward assist and brass deflector.
According to Steve of Wolf Ammo, the upper will retail for $599 with a carry handle rear sight. They are calling it the WolfA1. I think is should be called the Wolf91 since it is a Type 91.