If you don't have it already, get yourself a copy of Wooden Canoe, vol.33, no.4, issue 160, August 2010. As for the ribs, there are no replacements, but you can repair them. If you have studied the rib carefully from the side you see 11 layers! I rebuilt many damaged ribs by cutting out the damage down to a solid layer,then adding new wood - not necessarily veneer thin - but whatever thickness can be bent comfortably. I used epoxy to glue in. Then do a little shaping and cut out about 1/2" wider along the rib and add a second piece on top of the first, etc. I did use birch veneer as the top layer so it looks like the original. As you are doing this re-gluing you will have to keep the section bent very closely in shape to its' adjacent section, or they won't fit together nicely. By the way, if you know the serial number of your Linkanoe, please post it. These are the numbers on the outside of the hull, in dark red paint, usually close to where 4 sections join.