Hamilton Marine, rt 1, Searsport, Maine (ph 207-548-6302) (fax 800-639-2715) has a really good catalog that has a large group of rubrails (they call it Heavy Duty PVC Molding Sections) such that I'd think you should be able to find one that fits your boat's requirements.Look for their web-site, you can order their catalog from there @
www.hamiltonmarine.com.
I heard about them on this website, got the catalog, ordered the rubrail interior support only for my 82 Spindrift DS1. Received an exact replacement, slid my old rubrail on & voila, good as new, sorta.
They sent twice as much as I ordered & it took a while to get a return authorization (christmas rush, I guess) but I was pleased with their overall service.
Hamilton's catalog is pretty cool- intended for Northeast commercial boaters primarily, but it has good small boat stuff. Different from West & BoatUS & Competitively priced.
Good luck.
Lynn Larremore
Houston, TX
DS11539
Lynn Larremore (lynn.larremore-at-ss.ps.ge.com)