Front Brake Wheel Cylinders
 

I have an old 2001 3010 Mule that needs front wheel cylinders. I have ordered them twice now and the ones I get aren't the same as the originals. The internal parts are completely different. I did try to install one of the ordered ones, but would not work. I have temporarily honed the old ones (very pitted) and they are working for now.
Does anyone know where to get the correct parts?
I have attached a picture showing the difference.
https://cimg5.ibsrv.net/gimg/www.kaw...d66831c4bd.jpg