Modern Spare Tire Fitment

A ford escape spare wheel will work. 17" 5x4.5 and a 2.83" hub register (ours is 2.8", IIRC).

The tire will be too tall.

So, this:
[ame="http://www.ebay.com/itm/2007-Mercury-Mariner-Mini-Compact-Donut-Space-Saver-Spare-Wheel-Tire-17x4-/321299988873?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AEscape&hash=item4acef8c189&vxp=mtr"]2007 Mercury Mariner Mini Compact Donut Space Saver Spare Wheel Amp Tire 17x4 | eBay[/ame]

with a tire like a 125-70-17. These are common on Scion TCs and probably some other models.