I don’t know if you still need this information. I had a Santana 27 for about 30 years. I also owned a boat repair business in Marina del Rey, CA. Whenever I needed rubber extrusions for boats I used Wefco Rubber Manufacturing Co. They used to be in Santa Monica CA, but now are located in Canoga Park, CA. They have 250 different types of rub rail.
Address: 21000 Osborne St. Ste. 2
Canoga Park, CA 91304
Phone: 818-886-8872
Email: wefcorubber.com
Sorry I didn’t see your post a couple of years ago.