Oh, what a shame! I think Suzy has gone by now as well. All the MT ones are ex-breeders and need another dog with them, which is a shame. Otherwise, they don't seem to come up on rescue sites very often, I guess because they're good little dogs and most people hang on to them! Good luck in your search
www.companioncavalierclub.co.uk/rescue-and-re-homing/ Links on here to a forum which sometimes/often has cavs looking for homes and also link to regional rescue centres. I looked on MT as well and loved little Fawn but she needs a home with another dog (which we don't have ). Good luck.