I contacted Exact Aircraft Fasteners in Mission Viejo, CA, yesterday and
recieved a quote on a quantity of 28 ea of the CA 1820-2 (ss) @ $18.90 ea
and the CA 1810 for $19.53 ea also in that quantity.
For those interested you may call Steve Gates at Exact, ph. !(800) 684-1148
or fax him at !(800) 551-9169 with your order.
He claims to have them in stock or be able to get them and ship in 7-10
days.
That's over $1000 for a set of 28!  I'm searching for a price break but so
far have found none.
Walter Dodson