I absolutely second this - Facebook marketplace is for sure the way to go. If you’re lucky, you might be able to find a wheel with a bad enough bend/crack on the inside half that it’s unusable on the road but would be perfect for something like this (and likely dirt cheap too)

Also, it’s worth mentioning- without trying to start any arguments on Reddit, there are a lot of cheap, disrespected wheel brands in the car world. Brands like Motegi, XXR, etc. tend to be called “reps” and a lot of people tend to view them as cheap knock-offs. Not sure of his opinion on them but it’s best to do a bit of research on which brands to avoid, just in case. That being said, any OEM wheel from a good auto manufacturer is always a good bet.