Tires-easy has one for like $60 with shipping. If I bought a Mirage, I'd pick one up just in case I couldn't get a replacement quick.

Back when I had my 2001 Taurus, it used a bit of an oddball tire size. There were only like 2 or 3 cars on the market that had used that tire size in the past. The tires were expensive and not a great selection. Of course, today, it's a super common size.

One of the good things (or only good thing) about living in the snow belt is I always have a set of snow tires that could work in an emergency!