I am very disappointed with Kubota over this... very little fusion on the side that separated.
I would extract the rubber isolator and repair the mount.
I, Spraynard, would drill the dipstick (off center) for a .0625" diameter type N mineral insulated metallic sheath thermocouple.
I would do that because I'm hip-deep in .0625" diameter type N mineral insulated metallic sheath thermocouples.