thanks Karl,
its not urgent, mine is cracked and where adhesive was tried in the past it has blackened the top 'lip'.
i have been considering adapting and using an LED light, advantage being very bright and no drain on the main battery, or a front light from an enduro M/C as that would be more robust plus i can blind people when i feel evil
either way if i have no luck (ebay etc.) perhaps he will be attending the Brooklands C5-25 meet next month, i know when he shows he often brings spares, so i can perhaps grab one while their and get to meet Adam himself (if i'm worthy
. )
regs
alan