If you want to increase the likelihood that everything gets done to your specifications, it is not a bad idea to provide a written list/description of your repair request(s) possibly with photos for the repair shop that you wind up hiring (particularly if you want multiple spots on your boat fixed). Sometimes repair folks may operate like waiters who think they can remember your whole order but don't.
If you can't find anyone local who specializes in surfski repair you may also want to consider local yacht repair shops for simple patch and paint repairs. Sea kayak shops may also be able to do repair on surfskis.