The author is in Australia and gets his wood locally. I live in Michigan and I am looking for a source for balsa planks. I found a few spots but the longest pieces available are four feet long. Where do you buy your long planks and what is the longest available?
Frank, Had you considered using a species that is indiginous to your area? There is usually a tradition of doing so among craftsmen of any particullar area. A little research might reveal what has been used in your area. I made a bunch of cedar strip canoes one time with some 20' rips from a local mill that I got for next to nothing. It made a very sound hull. Doesn't get that heavy if you don't go crazy with the gunwales and seats etc. It's alot of work to make a canoe and you will wan't it to last when you're done or sell it to someone for a nice chunk when your through with it.
You could make that little boat strip planked out of poplar or red cedar and it would only weigh a few pounds more....... You'll probably end up paying $25+ a board foot for long hunks of balsa shipped to you.