Nathan,

Perhaps you can search for the parts at Sierra Marine:
http://www.sierramarine.com/Sierra/prodline/index.htm and then search
NAPA for the item number. If you look at a Sierra Marine catalog
and then look at Napa's Marine catalog, it apears that pretty much
the cover's are different and that Sierra's name was swapped for
Napa's. :^) Last year I needed an impellor kit and West Marine
didn't have the part in stock and would take several days to get it,
but the manager pointed out that Napa might have it in stock.
That's how I found out about Seirra/Napa. I appreciated that the
store manager suggested I try NAPA 'cause I didn't was to wait. :^)

-Jim