Where can you buy them online. I as just looking for 30 mins and couldn't find them.

The joiner on my old paddle had holes drilled in the shaft where a metal pin went through .....it was good. But my new paddle has the squeeze type joiner that just uses squeeze pressure to hold the shaft. I find that the handle shaft moves out of alignment with the blade shaft when paddling hard. Ive tightened screws on the plastic adjuster but it doesn't make much difference. My next move is to smear a coating of polyurethane black silicon goo over the handle shaft the give the plastic joiner a better grip.

Anyway point is couldn't find the plastic adjustable joiners anywhere online.