If you still want a spare, I have a factory 19 with Potenza with very good tread. 2 others also with good tread. I am off that day so I will try to make it up there. Have a link to your business website for address, etc.?
I know Jordon. He detailed my car for me a little while back. I helped him install his HIDs. I was looking for a pair of 19's with good tires because I needed tires and would have liked to have a spare. I ended up buying a pair of Nitto NT555Rs (275/35r19s) for the rear for now instead because I was in a hurry.