RE: Replacing a fuel pump when all that is needed is a new filter
Here's a real world story, happened about a year ago.  Camped in Death
Valley with several other Vanagons.  One Vanagon had a noisy fuel pump.
While at the Furnace Creek Ranger Station, with the engine running, two of
the members of the group were listening to the loud pump as a stranger
walked by.  He stopped, got into a conversation, and stated "Yeah, I have a
fuel pump for that and  I'd sell it to you if you need it".  In the middle
of Death Valley no less!  Deal was made right there.  Then back in camp
first the filter was replaced.  Noise went away.  But replaced the pump
anyway and the old pump became the spare.  Another tale from On The
Road.....