Cusser
+1y
I've replaced my mechanical fuel pump twice in the near-20 years I've had my 1988 (second time free replacement, lifetime warranty). Both came with gaskets and a spacer, so I believe that I have two saved ones. However, I can't beat Rock's price/shipping.
Looks like even AutoZone and O'Reilly can stock these complete pumps so you could get today, but warranty is now 1 year.
Funny, when mine first went out, I went to store and their computer only listed an electrical fuel pump, so I had them look up "1987" and that listed it, so guy went into back room and brought it out. So computers aren't always so smart.