You need to get some Custom brackets.... make your own.. or find a bracket and mod it to fit the seats.
I got my brackets for $25 each, then i had to mod it... which i didint have the tools to do so, so i had the shop to do them for me for another $100 (so $50 each)?. which took about 2 hours.....
But or you can just get sparco brackets, and they should fit fine.