This is the one I just bought through Rainman for $13.50.
I checked the inside diameter of the new wind sensor hole with a drill bit. I had to back the set screw out and re-drill the hole to fit the existing Girard shaft. I believe I had to go up 2 sizes in bits. It was easy to drill the plastic. I put the set screw back into the new sensor, pushed it down on the shaft and it fit snug. I tightened the set screw and "Voila"....sensor fixed. Wind cups spun nice and free. The cups aren't white, they are black, but that doesn't bother me at all!
Here is the link.
Davis Instruments 7342-178 Wind Cups for Vantage Vue ISS