They are actually really rare. I used to own a Jack the Giantkiller one, and a couple other games were available in them, but they are far from common.
You wouldn't even need to copy it, just look at it and steal the design and you will get a great cocktail.
A few details, the machine is 24" between the sides, just like most classic cabinets (which means 2 full size control panels). I don't remember how tall it is though, but kspiff owns one, so he could measure the height.