Early Grantura indicator switch information please?

[tobsam]

At the moment my Grantura Mk 2a has the later Grantura Mk 3 indicator arm that is fitted to the steering column. I would like to remove this and fit the earlier Mk 2a indicator switch that was mounted on the dash. I cannot find any information about this switch ie was it a lucas switch or what car would also have used this type of switch.

Does anyone have this early indicator switch still fitted to their car and if so could they possibly take a picture of it please so as at least I will know what it actually looks like and then be able to try and source one for my own car.
I will also need to find a horn push button switch as well as mine is currently incorporated in to the end of the indicator switch which I am planning to remove. Any ideas?

Thanks
Steve