Light Switch Badly Broken

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Working with my newly acquired 29 H Roadster, I have found the light switch that mounts at the steering box to be badly broken and the last fix done years ago has given up. Does anyone have a useable switch they would give up or know where to purchase one? Taiking this on a tour at the end of the month that will include some night driving and lights. I want to avoid some sort of temporary wiring mods if possible.

thanks for any leads.

Ivan