the pressure switch needs replacement on the p/s pump, where and how do i?

What is your question?

on my 3 liter h6, my p/s pump has a pressure switch sensor that keeps blowing out and spraying fluid. i took it out and it sems like the star washer and grommet that keeps the brass male business in the pump have no retention left in them. the p/s pump works well enough to not replace, i just need the sensor. anyone else seen this issue and how did you solve it?