Parts sources for us MULE owners.
https://www.kawasakipartshouse.com/
https://www.rockymountainatvmc.com/
https://www.partzilla.com/catalog/kawasaki
https://houseofkawasaki.dealerspikeparts.com/oemparts/c/kawasaki_utility/parts
These are the best places for machine parts such as, wheel bearings, and switches, cables etc.
I've noticed if a part number for your engine gets superceded, they list them as unavailable.
to get engine parts if one is unavailable get your engine model number (Should start with "F")
you can go to:
https://www.kawasakienginestore.com/
https://www.jackssmallengines.com/
https://www.partstree.com/parts/kawasaki/
https://www.propartsdirect.net/
Edit: 4/19/2020