I have emailed Jayco, but I obviously don't have the right contact because the just say they don't have a model like that in the 16' and they couldn't do it as a one off due to the the time and engineering. Hmmm... Wonder who I could contact.I know a bloke who works there in that sort of area and he told me they can do modifications but it has to be in their quieter time, probably about now actually. I was looking at getting a new 18.57-5 made because its an existing plan just not made anymore. They even found one for me in a country dealer but in the end I found an excellent second hand one so didn't go down that path. It did look promising though.