Found great curtain maker
Okay, I know this thread is old, but then so is my faithful E27.
I, too, had nice curtains that eventually rotted from sun exposure. I had gotten a quote of $500 to make new curtains; too much, in my view.
Then I happened to find out that a friend's aunt would be happy to make them for $280, including hand-sewing on the nylon slides. The curtain slides fit inside a U-shaped aluminum track that mounts above and below the windows. There are four large curtains and four smaller ones for the E27.
I gave her the old rotted curtains, waited a few weeks, and got nice new ones. I've enclosed two photos showing the installed curtains (up in Friday Harbor, Washington).
I fortunately had all the nylon slides needed. I'm sure the slides are available on the Internet, but in addition I have seen them at J&R Upholstery ("Ruby") 360 378-2850.
If you want to get pricing on curtains for your boat, contact Auggie at 503 869-4300.