any systems you know of that fit the neport 33 ft curved track traveller
Jim, many older boats came with those curved tracks. Eventually, people who truly understood mainsail trim pointed out that a curved track changed the shape of the sail when the traveler was adjusted because it pulled down on the boom much more when it was set out than when it was centered.
Garhauer, long a supplier to Catalina yachts, responded to this challenge by designing straight traveler replacement tracks for many Catalina models, and began supplying OEM equipment to Catalina in lieu of the original curved NicroFico tracks.
Other rigging vendors make straight tracks, too.
Garhauer is a very responsible and responsive company. And they will talk to you on the telephone. It could well be the case that they already have a solution for just your boat.