Thanks Warren. I'm sure people won't like this but I'm thinking of putting in something like this:

http://www.holley.com/12-802-1.asp

It claims 88 GPH at 9 PSI. Sounds like a pretty close match.

I've already torn my old pump apart apart once, cleaning up the stator and replacing the brushes. But it is still unreliable.

Let me know if anyone has any suggestions.