Fuel Pump O-Ring Part Number?

[SeattleSER@aol.com]

Recently acquired a 300ZX TT Fuel Pump.  Searched the archives for hints on
install.  One post hinted that I would need a new O-Ring for the fuel pump.

Had Nissanparts.cc do a price check on that particular O-ring but to no
avail.  They said that it is not sold separately and that I'd have to buy the
SR20 fuel pump at 160 bux to get the O-ring.

Is this O-ring really needed?  Where can I get it w/o having to buy a whole
new fuel pump?  Part number?

Thanks,
Nollan
97 SE-R