Here is a pic of my home made up holder works great first you remove center hump plastic .go to academy get some black plastic cup holders ,go home and cut holes in plastic and shove the boat cup holders in the holes and whala !
Well, it was a little bit of work. I actually work for Magic and Sleek Powerboats so I got the cover from there. As far as making it work, I had to add a piece off wood to the cubbie for the radio cover to mount to then I glassed it in using speaker cloth and fiberglass resin. Then just wrapped it in black, carbon fiber vinyl. To me it was just another day on the job but I guess it could sound like alot of work.