Arnolt Bristol dash questions

[Nigel Wingspanner]

Hello everyone!
I work at a restoration shop in WI and we are working on an Arnolt Bristol. I am looking for a few pieces or a source for parts common to other cars. I am currently working on the dash and am looking for an Ignition/Headlight switch, Indicator lights, and the paddle handle for the turn signal switch. I am also not sure the horn button is original. Anyone know what they are supposed to look like?
Thanks!
Bryan