Light Switches

[Stuartk]

Well, I require two light switches for two different T2s and the switches currently in the vans are 211 941 531 . These both have a terminal labelled 57 which the replacement ones don't have! .
Any ideas as how to rewire or hopefully where I can can the correct switch ?
Challenge time !
Stuart

 

[sparkywig]

I've got 6 light switches. £30 with knob or £25 without, plus postage.