Where can I get the plastic end replacements for the cable in the box, mine broke on the water yesterday. Can I make one or repair it. Looks like a small white plastic tube. It has shipmaster on the side. I am running a 62 Johnson Seahorse 40 HP on a 15' MFG Niagara. Thanks for any help. It also goes into gear easy one time and then harder the next if any one has an idea? It was my first time out yesterday. 