"Dave Plowman (News)" wrote in message
...

The originals appeared rather like a PCB made of thin flexible plastic
with silver coloured tracks as the heating element.

Is there room to fit a light bulb or two? You could run two in series for
heat without much light.

Another way would be to buy a 240 Volt radiator element and some fibreglass
tubing and make up a 12 volt heater that way. Cut the wire off the radiator
element - 1/12 of the heater rod would be too little so use double that
perhaps.