If you picked up the pair in south NJ, I’d like to hear how they turn out after repairing.
miller sound is your best option for quickly getting them up and running at/near close to original spec.
regarding resurfacing the exterior, I would suggest a slightly left field approach: cover them in leather.
you can find dark brown leather that looks rich, like wood and will be forgiving to apply with 3m interior trim spray adhesive.
I would also suggest hitting the interior wiring connections and crossover circuits with deoxit to freshen up the connections