Electric Wiper conversion question

[1965cj5]

My 1965 CJ5 has electric wipers installed in the holes (top of windshield) where the vacuum motors were. Current motors have a 2" shaft. All the replacement motors have a 3" shaft. Anyone know what the 2" shaft motors are from or where i can find them? Thanks in advance.

 

[IOPort51]

is there a reason you can't cut them off??