Those loader control valves all used to be 2-lever types, usually with options for PB port and a detent on one spool. Other than that, one looked for matching GPM rating and compatible hose threads.
The "Joystick" type of operation just adds a lot of monkey motion and control cables so that one lever can work what two levers used to do. It's nice, but not absolutely necessary.
I guess what i am saying is that if you just cannot fix the joystick, you can always change back to the control valve being the old two lever type. It might require remounting and some extended hoses