The model is from another source, it isn't the best model, but I want to use it to weigh up costs of bigger things.I will probably make my own, or if I can get better ones use those.
I have done resin casting before, on a very small scale, and have stuff in my kit making box. You are right the nab chairs would be a pain, and probably not worth it. I would generally cast stuff that was easy and made sense.