Looking for replacement vinyl top

I posted this in the exterior section awhile ago but I havet heard back from anyone so I will try it here. I am looking for a new vinyl top for my 83 Riv. I have seen them around for around $150 or so. They are fiberglass I believe and are covered with the vinyl/canvas material and simply fit over the roof and are either snapped or epoxied into place. If anyone has seen the episode of Pimpin My Ride with the orange Eldorado, that is what I'm talking about. I can't find anything on the web that resembles this. Any help would be greatly appreciated. Thanks