I scored the new set of mansion tombstones today! They are beautiful miniature versions of the Good Old Fred, Master Gracey and Madame Leota tombstones. They are 4 inches (10 cm) tall, cast in a very heavy material and have great detail.
I found mine at the Disney Quest store at Downtown Disney in Orlando but I'm sure they are available in many other places outside of the parks (and they are also available at Disneyland in California).
Thanks for the help in finding mine, Matt Roseboom (Orlando Attractions Magazine)