do you have a tower?
My boat has a pretty cool one that was made by CustomCovers (I think)...
It mounts to the tower and folds up easily. There is a thread on the forum about it the previous owner of the boat made, Ill have to find it and post.
Also, I have the standard Bimini that came with my boat I might be willing to get rid of if it fits. The cover is a charcoal gray/black color. My boat is a SX22, I am not sure how different the bimini is........