If you're looking for stability, check this out:
Attachment 322059
All it is, is a pool noodle slipped over bent conduit, screwed to the gunnel.
Attachment 322060
The below picture is from many many years ago. with this canoe I remember being able to get into the canoe from the water on the side very easy, it was so stable. This canoe had extra large noodles!
On the above, I did not screw anything to the canoe. I just wrapped bungee cords around the cross members, and the bent conduit. In this case I connected both sides together as you see pictured.