Fantastic stuff Andy,
Two things occur straightaway. First, contact Brooks, tell them what you're doing, why you're doing it and see if they will make you a saddle.
Second, contact Hope or Lumicycle, same thing, get them to make you a fake carbide lamp with a halide lamp!
I'm sure any of these companies would/could be made interested. Then contact one of the London news networks, tell them what you're doing....