Oh chit! Sorry to see that... Glad it wasn't worse!
Do you not trust your spare on the street? I know you had a sidewall sectioned at one time...
If you're willing to run that one, I've got that brand new 35" KM2 on a 5x4.5 rim I can lend you as a mismatched spare so you can go.
But if you use it, do try to tighten those lugnuts!
Robert