Hi Dave Wermuth,
Finding new plans is cheaper and smarter than finding a new wife (my Paminator is the only thing that brings some order to my cluttered life).
Such plans are in numerous old copies of books from the 1890's through the 1950's. W.P. "Stevens Canoe and Boatbuilding", published in 1889 and reprinted a number of times, has fantistic plans in the form of 40+ plates that came with the book in a separate package. Hard to fine, especially the plates. I found the book and looked for plates for 2 years. My wife found the plates for me in a antique store. I think Dan Miller has put the book on line and Mystic Seaport reprints the plates. The plans are for carvel and lapstrake wood canoes, mostly sailing, but could be adapted into skin canoes. Another old book on my shelf is "Canoeing, Sailing And Motorboating" by Warren H. Miller, 1911 and reprinted a number of times. Chapter three is "How To Build A Decked Canvas Crusing Canoe" Plan is somewhat sketchy, explanation is good. About five good plans are in an English book on canoeing by Percy Blandford. I just loaned my copy to a friend so I can't give you the title tonight but if you email me I will get the title to you. He wrote a ton of books so you need the exact title. Used copies are around. I also loaned that same friend a copy of a home builder magazine from "Rudder" 1958, which had a very nice canvas canoe/kayak design. Title was something like "20 boats you can build"- email me and I'll get you the exact title. Mystic Seaport library probably has a copy. Popular Science, Popular Mechanics, Boys Life, and many similar magazines from the 1950's frequently had canvas canoe/kayak designs. Many of the canvas canoes/kayaks seen in antique shops, tag sales and town dumps are from this home-build era. There were also many commerical builders and still are a number for folding kayaks. You can build a rather minimal and crude frame and cover it with canvas or a number of other materials and be on your way. I would suggest instead that if you are spending the time and money, do a good design. To see how far this skin-on-frame home-built obsession can go, Google "Tom Yost" and see his home-built folding kayak designs. Don't know where you live, but in Sheffield MA, at the Berkshire School there are courses if you want someone to guide you through the process on building a skin canoe. Their site is BSN.NET/BOATBUILDING. I've seen one of their canoes and it is well done (synthetic skin). There are skin kayak courses everywhere if you start looking. Most could help you build a skin canoe.
Hope this post takes the heat off your good wife (she has to be good to put up with someone who holds a grudge for 31 years).
Dave