Vans parts department is up and running and I received my angle stock within a week. Was able to fabricate and assemble the right seat back to match the left side. Also went back and countersunk the holes that match the dimples at the crossbar.
Won't be able to prime and finish these until it warms up a bit in the spring.
Also sent payment for the remainder of the AC. Doubling down on Van's making it through all of this.