[V8] Brake issue, reservoir grommets?

[John Bysinger]

So the 1990 started leaking brake fluid so after seeing a large repair bill
flash in front of my eyes, I thought I would take a look.  And well, found
the problem!  The two rubber grommets under the master cylinder reservoir
have completely and totally disintegrated.  Things might as well have been
made out of play-dough.  I tried doing a bit of hunting online and was only
successful at finding replacement MCs, which at $400+ are a bit more than I
should be spending right now.  Anyone got a part number or maybe a
recomendation on an alternate make replacement I could pick up at the local
parts-whores?

Thanks in advance!

-John
'90V8Q