Howdy, Gary - and welcome!
Where in NorCal are you located? I've got a few options for you.
If you want it done in the Bay Area, you can't beat
Svendsens in Alameda for a quality job. They make top notch stuff, but they are pricey. I'm taking a wild guess they would be around $1000-1400. I got all of my stainless done there on my first C-Dory, a 19 Angler.
Here's a link to pics (click the small photos for full size pics). They did the top rail that holds the rod holders, as well as the rear motor well rail.
However, things are far cheaper up in Washington - I'd suggest getting it done up there if possible. I believe the factory has somebody local they work with, and Steph at Brooks Marine in Anacortes (
here's a link) did the arch for my 22, as well as Fred's (Anita Marie.) Mine is lower profile, Fred's is a little taller; if you are planning on mounting your kayak under the arch, Fred's would work better. If you are thinking of mounting it on top, I'd go with a shorter one like mine.
Here's a link to my photo album,
here's one for Freds. In my album, there are also a few pics of yet another manufacturer's arch from the Seattle Boat Show on the first page - I believe the outfit was called Tanner, but the factory would know for sure.
Which dealer are you getting your boat through?