B3 Coupe Quattro PS Pump, rebuild??

[JShadzi at aol.com]

Hey all, what's the best option here, I've priced out rebuilt units for about $350, the pump I have groans really badly, are there any more affordable options?  Would a simple seal-rebuild fix the groaning problem?

Also, anyone see any negative consequences from plugging the 3rd port on the pump, the one that goes to the bomb and brake assist hydraulics?  This pump will be going on my 80tq with vacuum assisted brakes.

TIA!
Javad