I still haven't seen the film yet (!) but I was bored one night and, after seeing the awesome trailer, I put this together.
Two versions are available - one without mounting holes and one with. The holes are 3mm (M3). I've also attached the Fusion360 archive file to allow you to chop and change this as you like. Should print quite easily without supports etc, but I haven't got round to it yet.
You might even be able to print the layers (such as the top thin bat layer) in multiple colours if you have multiple extruders.
The author hasn't provided the model origin yet.