Dash lights switch

[Yaz K]

Any idea where the dimmer switch for the dash lights is from? Local Dealers couldn't find out for me!
It's an S4 type, so it's to the right and under the steering wheel.
I saw in the parts list that the earlier types may be from a Marina?
Thanks.

Yaz K - Green S4C!

[keirangrogan]

My switches have "Lucas" stamped on the back, so therefore presumably available through Lucas distributors.