An acquaintance of mine recently introduced me to an exchange network for trading scions, cuttings, rhizomes, tubers, and such. I just joined and it looks like from the members have & want lists, there is quite a selection available. Please take a look.
http://tech.groups.yahoo.com/group/scionexchange/
"This is a place where people who are in the United States and Canada can find, exchange, and discuss scion
wood, rootstocks, various fruit
trees, and other orchard plants."
"Limitation is the mother of good management", Michael Evanari
Location: Southwestern Oregon (Jackson County), Zone 7