Power Steering Questions 4 00 V8

[00LincLS]

My PS pump may be going out. So I’m looking at possibly replacing it. From my understanding there’s a low pressure and high pressure hose.

1. Is it best to replace both hoses and the pump if it is the pump?
2. Any suggestions or part numbers for a pump?

Only asking since I’ve seen a couple of different posts about differences in pumps.