Robbie -
My Murano "Cat" was sold several months ago; however, I "Googled" Murano Cat with fish in belly just now & found several pieces for sale on the various Internet sales venues. They ranged in size from about 4 inches tall to one similar to mine which was 11+ inches.
I did not keep the link or information for that British dealer but you may want to search for Murano Dealers in Great Britain.
Good luck in your quest !