Sunflower memory extension boards for 3/50?

[kusalik%SKLPL.USask.CA at cornellc.cit.cornell.edu]

A previous message in this digest mentioned that memory expansion kits for
a SUN-3/50 could also be obtained from "Sunflower Microsystems in San
Jose".  But no telephone number was given.  I tried directory assistance
for San Jose and they couldn't give me a number for Sunflower
Microsystems.

so ...
  does anyone know the telephone number?
and a more general question:
  does anyone have any experience with SUN-3/50 memory expansion
  kits they would like to share?