Diverter Valve Replacement for Doulton Countertop filter series

I need to replace my "Diverter Valve" for my Countertop water filter, how can i get one?

 Please see our ACC-DIV-CP diverter valve replacement assembly for $ 25.00 on the following link: http://doultonusa.com/HTML%20pages/doulton_filter_parts.htm.
Replacing Diverter Valve Kit on Doulton Countertop Filters Instructions.