The bulb holder that was inside the sign is totally shot, probably due to the bulb heat and fire.
True to the spirit of Dyk I have shoe-horned in a 12v neon tube from an old light in there. Its a very snug fit although I’m going to look at popping some sort of padding to reduce the risk of it breaking during the journey (bubble wrap, the tube shouldn’t get hot right ?)
The light can run off any working 12v we find, or from the cigarette adapter as we shouldnt need the laptop running much.
I popped in the the old taxi sign and lit it up, it looks great even if I do say so myself.