NODE Computer Systems sells 8k expansion modules for 25.95 ea or 69.30 for 3.
They send them by UPS Second Day Air at no charge. I've got 3 in my Olivetti
M-10. They work great. Their address is : NODE Computer Systems
720 Capitola Ave., Bldg D
Capitola, CA 95010
(408) 462-3773 They take Visa and Master card.