Originally Posted by saga
Fabricate a new hole in the replaces dash for the foglight switch. Shouldn't be too hard to cut the hole then mount the switch. I haven't looked at how those switches are mounted though so I may be wrong. A dremel with the appropriate attachment would make cutting that hole in the dash rather simple, or a jigsaw.
It's pretty hard to cut a perfect hole for the switch, as it is a unique shape. Also, not sure what is behind where you're cutting.