out the bent portion of the keel tube, and slip a piece of that conduit tubing over the cut ends.
There is a chance that the conduit tube won't be stiff enough once installed. In that case, aluminum tubing is not hard to get, and a piece with inside diameter selected to slip over the cut ends of the original would do the job.
Heel and Pegpads™
Recreational Kayak Paddle
Touring Kayak Paddles