"It looks as if I'll have to wait until a new switch arrives from an online
vendor."

......or, go to a local wrecking yard and grab a couple off some "bones"
there. I've gotten 5-6 that way over the years, that work fine. That is, if
the switch you're talking about is the dash on/off switch.

Bob Stevens
'87 Westy Syncro
"Passion Fruit"