One of the assassination missions requires that I be driving one of the limos in the game, the Status Quo. I've seen them from time to time (normally when I'm wanting a high-speed getaway vehicle they're everywhere!) but I've been driving around the city looking for one to no avail.
Is there some place where one is parked that I can grab it? Failing that, do they spawn frequently in some area?
I'm done with the missions and side activities for the most part, so if there's one that's missable, I probably have missed it by now.