This is a comparison of a mild Dr. Who Mod I am currently working on. I removed the original Police Box and am replacing it with a much more detailed and authentic model. The newer version has the Saint John Ambulance badge and call panel easily visible. The roof light is very authentic and has an ultra bright blue LED. I am still doing some dremel work to get it nice and clean onto the playfield and between the ramp and target area. Big difference when you see the original and more authentic versions below.

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Ok....ok....Here is where I got the replacement Police Box(Tardis) http://www.amazon.com/Doctor-Who-Tardis-USB-Hub/dp/B000F46CQM It is almost identical in size and you will have to do some modifications but not much.

Cool!! FYI..It comes completely apart easily with 4 screws on the base and 2 in the roof. After you remove the circuit board its a little tricky to reassemble. I used some hot glue to strengthen the joints because the playfield wire form wont allow the base to to be used. You can use the same mounting brackets. Good luck : )