My gfriend has a 2009 Ford Explor. There is 20" rims on the truck right now and the tires are very expencive to buy. I want to change rim size to something smaller, like a 16" or 17". I was thinking about going to the auto wreckers to go look for a set from another Explor or from a pickup. What years will fit her bolt patteren from her Explor? Thanks for your help!