I wouldn't know a supplier online but I would see if you have a local place that custom makes them to fit your boat the way you want it to fit. If you try to buy one online I would imagine it would be made to fit under the bimini. If you end up with one like that just take off the bimini when it's covered and put the bimini in a garage.
My Bimini fits under my cover so everything is covered and protected when not in use and stored away. The more you have to remove it and store it, the more chance of scratching your boat or braking something.
While I recommend none, I have found two that I was pondering over for my 2004 Speedster. One is on ebay (axess marine) and one from a boat supplier in Maine called JM Camper. When I visited the JM Camper site last (today), they seem now to be infected with a JavaScript Virus. It COULD BE a false positive (the 'trojan is listed as low threat, JavaScript script packing tech, so I think it is safe but...) use at your own risk https://www.jmcamper.com/sunshop/index.php?l=product_detail&p=358
I have done everything short of getting measurements from an actual speedster to compare to what they provide, but both are suggesting they they get their parts (or measurements) from compan(y|ies) contracted to make these for seadoo.
When I have the bux, I will buy ONE or the other.
Cerb