Unlikely, I'd think. If the colours are faded, you could always fit coloured LED bulbs (worth doing anyway). Keep a normal bulb in the "generator" position.
@davidoft - that sounds promising! If you have I'd be delighted to take one off your hands for a fair price?
Here's one of me I think @Barry Haynes sent this one of him to me by mistake so I'm forwarding it onto you.