Thanks Bill had to be sure ;-)
Yes you can get spare parts for this unit
Please visit this link for them, its the best place for parts for this one for a many reasons price, and reliability are two good ones.
Please visit: http://www.thecaravanshop.co.uk/water-taps/smev-tap/smev-mixer-tap-ac539/prod_738.html
I would simply call them because they dont list all parts on their site,and if you call, they usually ship the same day!
Please call them : ***********
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.
Thank you and have a gewat day Bill;-)