Need a replacment water valve for a King of the Road!

[dmascheck]

I just broke the plastic water valve that allows the water tank to be filled, broke it of flush, so I have to find a new replacement.

I have a 2006 King of the Road Royal Villa.

Any one have ideas. I've attached pictures. I have closed the front and back. The bottom valve is broken. Sorry the front picture is rotated for some reason!