7.5x9 4 blade 12 spline for tohatsu 9.8

[goatman1]

im looking all over for one of these props but cant find one. i believe im running a 8.5x9 3 blade right now but would like less vibration without sacrificing the speed of a 3 blade but the only 4 blades i can find are 8.7x7 which is higher thrust and you lose 2 inches per revolution

 

[pvanv]

8 and 7 pitch are the only options currently.