Why not just build more A-10s?
IIRC, the tooling was destroyed, not counting all of the subcontractors who have probably long since gone out of business.
D-M has many A-10s in storage...rework the wing boxes (mid-life improvement) and get them flying.
GAU-8 Avenger 30 mm rotary cannon
In this day and age, who knows if some of the manufacturing jigs/tools/dies were 'sold' to China. As I believe was the entire B-1 Lancer Rockwell plant (Columbus Ohio).