A stock trans comes with a 7 vane. I would stick with it unless you are using a bottom feed filter. But the 7 works the best.
There aren't many good retail kits. I have my own calibration as do many other top builders such as EA and Janis. But if you need to get a kit, try the CPT (Art Carr) or B&M, they would need to be altered to work correct, but would be a good starting point. I am assuming this is a BR-F trans
Contact a vendor and see if they can build you a custom kit for your trans....