I got 2 from a Dodge Dealer a couple years back for $50 each. I went to Advance auto and my friend who worked there started pulling pulleys off of the shelf until we found one very close to the Mitsu one. All it needed was a washer to fit. It had sealed bearings too, I have no idea what car it was for or what brand or part number, but it worked. I do remember it was only like $15-20.

I just want to tell you both good luck, and we're all counting on you.