The most expensive part in this assembly is the Shaft,first,input,16t.
Some items from this specific schematic: Shaft,first,input,16t, Spacer,28.2x34.5x1.6, Shaft,third,16t, Circlip-type-c,25mm.
The most reasonably priced component used on the Kaf400-dbf Mule610 2011 Usa / 4x4 Xc Transmission is the Pin-dowel,3x8.