No aftermarket pumps. You can get one rebuilt but not sure if yours would be a core candidate if the delivery valve threads are shot.

Try the classifieds here and car-part.com for a used pump if you need it. That's a national listing of dismantlers parts. Not all of course but its a nice place to search for parts.

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'98 E300 Turbo "Juliette"
'85 Federal 300TD