freekazoid

ok so i can turn B1's at 5300 rpm's on my 35 Nordic at 83/85 mph. with about 550 to 600 hp. i want to try a set of 3 blade props but the highest pitch i can seem to find is 29 mirage +. i am also adding 1" spacers to my drives. anyone have any thoughts? from what I've read i can gain 3 to 5 mph from mid to full throttle with 4 blades. do they make bigger 3 blades? appreciate any input