For authentic USA made flight jacket I highly recommend this company:
A-2 Leather Flight jacket FlightJacket.com
Super attention to detail, they will custom make your jacket no charge, and the quality and replication is top notch.
I have an A2 in seal brown horsehide and G8 in black. Much better quality than my 30 year old Avirex (I love my Avirex also, soloed and tested in it)
Best, Bret.