I hope someone has a kit for you, but it is very likely you'll need to piece this together. To keep cost down I'd consider looking for other suppliers of the big ticket items, such as the motor, wiper arm, wiper blade, switch, etc... to keep cost down.
This may be a long shot...
The wiper motor is used in many applications, such as the B3030. The whole goods kit for B3030 is no longer available, but the kit does carry a p/n (not kit number as with a wholegoods item). Perhaps this kit is still available through parts (not sales) and will satisfy 95% of your needs. Then again maybe Kubota will do the same and convert the whole goods item number into a part number.
Link to B series wiper kit:
https://www.messicks.com/part/70090-10063/kit-wiper
Just trying to help.