[DonC]

There's a fellow in Colorado that runs a "Bimini" top but you need either a full length roll bar or double roll bars to make it work.
It connects in the front just like a regular top and then fastens to the top of the roll bars in the rear. It uses a modified bow in the center. Does a great job of keeping the sun out of the cockpit without obstructing airflow through the cockpit.
DonC