Does anyone know where we might mail-order (Internet-order) the clips/hooks for the curtains in our 1986 Princess 35?

They are plastic, and slide along in a groove. I did a search for "marine curtain hardware" and found something that looks similar on a site called recmar.com.

I'm not sure though, and thought I'd ask here.

Not sure of your exact type but any drapers/curtain place would do them.