It is surprising that Hobie does not sell (at least Austin Canoe & Kayak in Austin, TX, does not list them) those lines of appropriate length fitted with new tubes/rubber grommets in place.
Goodness, they don't??? I ended up using a complete tube/line assembly from my old boat, but it's a bit rough of Hobie to sell lines which clearly wear and break and not supply the part which is necessary to replace them. Jim's video suggests Hobie supplies complete assemblies with its rudder upgrade kit. I wonder if Matt could comment.