My opinion is that given the opportunity to replace new parts is to do it.
You use the words "just about to put the camper back together" which leads me to believe that there is a certain amount of demo for other repairs?? If that is the case (and if budget allows) then go new since it is open to do the work(<--???) Perhaps also consider installing an accumulator as well? I wanted to install one on mine, but when looking closer it would have been more work than I wanted to take on.
In my opinion when opportunity arises (and access) to install new then do it.