But I don't think he has a tower, Derek. Without the tower, there's nothing to attach the trampoline onto.
I have the stock Sunbrella bimini, and it's actually pretty nice. Sits low above the windshield, but looks good. Very sturdy. Mine even fits inside the tower (you just have to rock the tower forward to get it in place).
I saw somewhere that still has the Epic bimini when Googling a while ago. I just tried to find it again with no luck. But anyway, talk to Toyota. They can get you one.