Light switch TR6-1973

["P.J.T. Alferink" <Fam.Alferink@Zonnet.nl>]

Listers,
Never had an electrical problem so far. See, Lucas ain't that bad.
But yesterday faced some problems. The headlights wouldn't come on.
Today I checked the wiring and found that the rectangular switch in the dash
gave up. The central pin that is connected to permanent 12V had molten the
switch housing, probably due to some resistance in the contact.
Question, does anyone whether these switches are still around? Costs? Is
there a drop-in replacement?
Please let me know.
Pim