Thought I would share this. The first link is to a list of commercially made square stern canoes. Excuse me if you've seen this before. I did notice that the bigger Scott canoes like the Hudson Bay & James Bay are not listed.
http://www.canoeing.com/canoes/speci...quarestern.htm

This second link is to a custom canoe I found while perusing ebay. I hope it is OK to post this. A beautiful canoe with an interestingly designed stern:
http://www.ebay.com/itm/1994-Cedarwo...item2580955a0d

Cheers