Okay, so it never actually happened, but I bet we all wish it had. Even though this event never actually occurred does not mean you can't enjoy having an action figure of TARDIS Prime. That is, as long as you own or have access to a 3-D printer.
It's fully 3-D printable and requires no glue or screws. Shame it cannot be licensed to be sold. Looks to be as good as any other Transformers toy I've come across. Definitely looks easier to use than the original Optimus Prime toy with the trailer. He does offer the Auto-CAD plans so people can make their own.
If I only had a 3-d printer of my own. Ah, well.