Wherever you buy, be sure to get a complete stainless steel setup. The alum is crap and will fall apart, especially at speed or in rough water. I can run over 70 with my top up with no issues. It was a factory piece from advantage, but it appears to be the same as you would buy elsewhere.

Here are a couple of mine. It also turns into a full camper top. Some pics are from last year and the new graphics.