I had mine out to repair it. The crimped loops that held it together broke, so I cleaned it and put a blob of solder on each side.
I may have discovered my first error in the J.2 Spare Parts Catalogue. I’m regrettably famous for finding errors in the XK120 and Mark V SPCs.
All 5 SPCs covering the '38-48 models including LHD list the switch as Lucas 317082.
Mine is marked 317063.
A search for 317082 turned up nothing, but Holden UK has 317063.