There are quite a few cable pull/pull systems out there. I build my own using cable fishing leader material and the crimps that go along with the cable. Any good fishing outlet should have that on hand. I use regular clevises for the connection to the rudder. Here are a couple DuBro systems.
https://www.dubro.com/collections/pu...ll-pull-system
https://www.dubro.com/collections/pu...ll-pull-system
Ken