That switch is pretty universal. If you take it out and wander over to your local NAPA store (or equivalent) I'm pretty sure they'll have one with a longer snout. If you need a NAPA cognizant part number, I can probably find something in my "Standard" or "Echlin" catalogs, but they should be able to help you right at the counter.
If not, then you can do the reverse-dash grinding that Wolfie mentioned. I use a Dremel with a 3/16" metal rasp and gently buzz out half the thickness and a circle wide enough to accept the switch body, (If necessary). There is a Dremel accessory that screws onto the tool body that lets you set the depth of the cutting tool so you won't go through - that's handy to have, too, and prevents what happened to Alan.
I would try for the different switch, first. After all, if Steele could find one and not have to cut the backside of the dash, you can too.