Variac advice

Hello all,
      I'm sure this has been covered a million times so please bear with me.
I've acquired a staco 10 amp 0-120 v. input 0-140 v. output 1.4 KVA variac
with burnt windings. My question is,should I rewind it to the exact wire
gauge, # of turns, or is there a better way to redo these guys once the've
fried? P.S. this would be a perfect unit (size wise) for my x-former, input
120 v. 8.8 amps, output 10 kv 92 milliamps, internally current limited
        Thank's Shane