Help me understand how to find a spare wheel/tire.

I'm finding it frustrating trying to figure out what I need to put a spare in the back of my daughter's car!!

Her tires are 225/60 R17

She needs a 17" wheel that has 5x4.5 bolt pattern. Are there other sizing concerns with wheels or would ANY 17" 5x4.5 bolt pattern fit her car? I've found a cheap tire ($45) but it would need a wheel. When I called the salvage yard they don't know what wheels / tires they have in inventory... only models of cars.

Is there a resource I can reference that will tell me "Here are cars that use a 17" wheel with a 5x4.5" bolt pattern"?

A donut tire would be fine too, but I don't know how to find specifics of what she needs. Do ALL donuts fit if they have the diameter (17") and bolt pattern??

YES I know I can go to the dealer and buy an overpriced donut kit specific to our vehicle but I'm not interested in that.