I have a 24 Ft. Newport Neptune. Recently it was demasted. I have all the rigging, but need a new mast apron 30ft. Would prefer one with a slot for sail trucks, rather than a track. Any ideas would be appreciated
This is a very big subject. You haven't provided much information.
How badly damaged is the original mast. Sometimes you can 'sleeve' a mast with a clean break for not that much money.
Most of these boats used standard extrusions that are still obtainable. But it probably won't be a bargain even if using your existing hardware and rigging.
On the east coast, there is a company called RigRite that specializes in this kind of thing. (I think they are still in business.)
Adapting a mast designed for another boat can turn in to a huge headache. (unless, of course, if you find one that is really similar)