Originally Posted by Diseasel300

More like $30 for EACH PIECE. You're talking ~$300 for new D/V's. That's halfway to a rebuilt and calibrated IP. If the DV's are that worn, imagine what the rest of the pumping elements are like?

The OP can try polishing the DV faces, but failing that, it would be wise to find a good used IP or have the one he has rebuilt.

Before getting too carried away, check for air ingress in the fuel system, health of the lift pump, and fuel pump supply pressure.