I believe so. But you have the product itself, you have I am sure drawings and specs. And as I said with the advances in 3D printing I would say you could get them back in production pretty quickly. I am sure their are retired engineers that could be lured out of retire to help create a new generation of Warthogs!
As a fan of the A-10 and OA-10 I would have liked for them to stay in production longer. The only issue is that the plane was made for pretty much 1 task, tank hunting with the GAU-8 30mm gun.
This is not the mission that the OV-10 and other COIN aircraft are made to do.
If a modern version was put in to production the odds are that it would not have the GAU-8 but a much less heavy gun system and more precision guide weapons systems.