Actually, I got the opposite twice yesterday also...

This guy at one tire place, a small, single-owner shop that I've used in the past knew a little about it.
And at a muffler shop earlier, I told the guy it was for an "Isuzu SUV".
He asked which one and when I told him, he said "like that one in the picture in there on the wall?"
He's actually worked on one before!
I took that as a sign to have him do my exhaust switch.