Do you need the complete valve, or a couple of spools to add to the current valve?
I'm not sure on the terminology. Kubot uses a stack of valves to control the backhoe. For the factory thumb option, they add a valve to the stack. This "addition" is $560 without the hoses, fittings, foot control, etc.
![](http://i878.photobucket.com/albums/ab349/avc8130/Thumb/7image_zps0054de49.jpg)
That last piece in the stack before the end cap is the thumb "valve".
ac