Change Suzuki PU140 to a Propeller Drive

[Suzu140pump]

I would like to change my 1991 Suzuki PU140 to a propeller drive to ease up on fuel consumption. Does anyone know of a rebuilt lower unit/Gear case for this motor that is for sale?

 

[Tassie 1]

G'day and welcome,
you probably need to give a location,

 

[Suzu140pump]

Thanks, Burbank, WA.