About 10 minutes of searching on Ebay turned up at least 20 rebuildable fuel pumps, the ones held together with screws. Some were "core" types and others were "new old stock" or "rebuilt". More than a few were dirt cheap. There's nothing particularly exotic about compression springs- - - -a pump with too much line pressure can have a lighter spring installed by anyone capable of running a screwdriver. It would probably be a good idea to scavenge up a few for future use before they all get melted down to produce beer cans.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!