Suggest contacting your local lofts, like Jon suggested, and obtain discuss sail material, battens or not and finish/construction (e.g., inland, coastal, offshore including thread type and uv resistance, rows of stitches, clew hardware, etc.) for your type of sailing (e.g., cruising, racing, offshore). Then obtain price quotes.
You probably have crosscut dacron sails as I had on both my Hunter 31, 386 and 46. For my Hunter 31 and 386 sails I replaced them with crosscut dacron but added batten sails (partial battens for the in-mast 386 main) and Hunter 46 I just purchased tri-radial polyester cruising laminate sails, all with a coastal/offshore finish.
You find the following articles helpful:
Cross Cut vs. Radial Sail Construction: https//www.fxsails.com/sailchoicearticle.php
Modern Cruising Sail Construction & Materials:
MODERN CRUISING SAILS: Sail Construction and Materials - Wave Train