The Rear Suspension is made up of components including this Spring-leaf which is the most expensive.
The most reasonably priced component used on the Kaf620-rcfa Mule4010 2012 Usa / Trans4x4 Rear Suspension is the Nut,lock,flanged,10mm.
Some items from this specific schematic: Bushing-rubber, Nut, Nut,lock,10mm, Bracket,leaf Spring.