Can I replace the Dispencer of my Dishwasher DW1 5212P and Where? ?

We moved into a house a short time ago to find that a DW1 5212P Dishwasher was already installed. Unfortunately,, after loading we have found that the Detergent and Rinse Aid Dispenser is not functioning properly. Is it possible for us to get a new replacement Unit for the Detergent and Rinse Aid Dispenser and if so, can you give us the address of the company who supply such a part.

M Hyslop
November 2009