I used the Delphi pump from Rockauto when my factory one finally crapped out at 200,000mi. Not a bad run.

I can't speak to it's longevity since my neighbor plowed into the back of the truck while it was parked in front of my house soon after.

The job isn't bad as long as the bolts aren't all rusted solid. There are a couple good videos on Youtube that cover it. I rolled the back wheels up onto ramps to give more room to work.