Geezus, sorry to hear this. I too will keep an eye out. I'd say Craigslist and your local paper are the best bet. Someone is clearly looking for a quick payday, and they probably aren't going to want to deal with shipping...
Might also be worth your time to drive around to a few of your local tire shops also and see if someone had a tire mounted or three tires dismounted recently. Perhaps bring a photo of the rims and have the shops on the lookout...
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