If you are looking for an inexpensive bimini
top I suggest that you check out Attwood Marine
Bimini Tops For Boats, Pontoons & Jon Boats : Attwood Marine
I sewed my own top out of Sunbrella, so I do not know about the quality of the Attwood fabric
tops. But I do know that their frames are more than adequate.
The only downside to the Attwood bimini tops is that their frames are fabricated from aluminum
tubing and the fittings are plastic/nylon. I sail on a fresh water
lake, so these materials work fine for me. My Attwood bimini frame has been in service
for two years now without any problems.
They offer a wide variety of frame sizes, so you will have to measure your boat to determine what type and size to order. And since the top is ordered separate from the frame you can sew your own top or order it from Attwood. And if/when the fabric
wears out, you will be able to replace the top yourself, without buying
a new frame.