Otto,
Take a look at this article dated 2001:
Carter X Fuel Pump Rebuild
The vendor listed at the bottom is:
AMK
Broken Arrow, OK 74012
(918) 455-2651
Restoration hardware - AMK Products Inc !
Perusing their website, I don't see ANYTHING regarding Carter rebuild parts, but it's worth a call?
Or if you're considering repop rebuild parts:
https://secure.cougarpartscatalog.com/carterkit.html
https://www.deadnutson.com/carter-hi...p-rebuild-kit/