Just found this site, http://www.cavalierpetpourri.com/shop.htm

Cavalier Petpourri.
This is an expanding online catalog of unique gifts for Cavalier King Charles Spaniel fanciers.

New products are regularly being added for Cavalier owners to enjoy, in the knowledge that All proceeds benefit rescued, handicapped and/or special needs dogs (and cats too!).

They have some beautiful things and it looks like they might ship to the uk too...