Benson, thank you so much for the reply. I actually see no trace of the serial number on either stem, although I can recall seeing stamped numbers on at least one of the canoes as a child. If the purchaser was a reseller then I may be out of luck. If it was a direct purchase, the name would have been Robert Duryea and the address 405 Lincoln Avenue, Palo Alto, CA. If those don't come up then I may purchase the CD ROM (if I can find a computer that still has CD ROM on it) and do a search.
Thanks so much for the insights.