I’m currently desperately looking for valves for Cummins head fuel pump asse 495419900.We don’t need the part itself, but instead we’re looking either for a repair service, or for the valves only, that are inside of this head fuel pump.Those valves are ceramic and I don’t know their catalog #.We have already dozen of those heads broken on our shelf, and the replacement valves we’re desperately looking for would cost less than $100 while the new head with those valves inside costs around $600.Any idea about any businesses that do repair Cummins fuel pumps?Thanks