An .epc file is a Jill Game file, I'm not sure what it means but I'm pretty sure it's a model file.
The reason I ask this is because there is a fantastic TARDIS model from the game Doctor Who The Adventure Games. It would be a great addition to my many projects and experiments to do with Doctor Who.
Please if there is any way to do this, share your knowledge! It would help me greatly and I'd be happy to share with the community. Thank you