Call hunter or hunter dealer
I have found hunter to be very helpful asking questions when I was adding extra stuff on my 290,I've seen travelers on hunters with fiberglass arch but never really looked to see how it was done,give it a shot and ask here on this forum or hunter or dealers,I never give up until I get the answers on a project that I want to add to my boat,if you do get it go with the harken system that they use on the hunters,I am sure its not cheap but it works great,but whats cheap on a boat.