I just got off the phone with Elsa at Pacific Yacht Towers. I have to admit I am not excited about the cost. She quoted with tax, installation, canvas and six rod holders $3400. Pretty spendy. I know they are high quality though.
I got my radar arch done by Tom at Saltwater Specialties and really could not be happier with the work/cost, and how well it has stood up over the last 10 years. I don't have his number, but he used to be in Costa Mesa.