It takes a bit of mangling to get a working TV model into RetroCopy, and then on top some extra work to make it compatible with the object system. It's not really going to be something anyone can do.
Unlike 3D Arcade there needs to be more info supplied with the models as there are more things going on with them in RetroCopy (lighting, speakers, and controls in the future).
I'll try and get as many in as possible though for variety reasons, and probably allow users to upload their own arcade pictures to get around any legal issues.