When my pump went out, I sent it to Jim Weaver at 1029 E Selwood Court, Columbia, SC 29212-8103. http://www.topmotorrepair.com/
If your pump / motor is able to be rebuilt, the fee is $125 and he guarantees it for as long as you have it. He needs to see it to determine if it is too far gone for a rebuild.
Dion on this site used him and recommended him to me. My pump worked fantastic once I got it back. And he includes instructions for the best way to fill and bleed the lines.
