Kubota B2710, IH TD6-62 dozer with Drott 4n1 bucket loader
I have no idea who they used for their 2 spool control valve but I think it was of European manufacture.
However, there are several choices available out there, Prince is one. Get yourself a Surplus Center catalog. They have several to choose from. You will probably want something that is less than 12 gpm so it won't be huge and heavy size wise.
At surplus center there are some that can be mounted remotley. What I mean by this is that the actual joystick moves cables that move the spools. It's a kit that adds on to I think the prince valves. I found it while looking for something else.
Kubota B2710, IH TD6-62 dozer with Drott 4n1 bucket loader
</font><font color="blue" class="small">( my L4200 has HUSCO brand valve and joy stick)</font>
The Husco valves on all Kubota tractors are Kubota proprietary. Husco will not give any info about them, including specs, repair kits, etc. They refer you to your local Kubota dealer for any and all information.