Some websites that I have found which sell kitchen/dining/food preparation products for the elderly are:

http://www.procterhealthcare.co.uk/kitchenanddining/

http://www.seniorssuperstores.com/cart/html/Products/KITCHEN-PRODUCTS/

www.livingmadeeasy.org.uk

www.ageuk.org.uk is also a good website which provides information and some factsheets about caring for the elderly etc.