What is the likelyhood of an 8 1/4 sbp?

that throws a big financial wrench into my plan #-o a sure grip differential for an 8 1/4 is about $300 whereas the same thing for 8 3/4 is like $700 :mumum:

guess i gotta go find someone willin to sell a used 8 3/4 with suregrip on the cheap!