I have discovered a reasonably priced headlight switch interchange. '70 Mini, and '68 - '76 MGB. Interchange #13H6322. There are only 3 terminals: #1 is for headlights, #2 is power (pink), #3 is park. Pretty simple.
One source here for $23.50:
http://www.ebay.com/itm/Brand-...em27d7936f90&vxp=mtr
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