For your specific year/model, I.m not sure if a full sized spare will fit, but I will say that
many vehicles out there WILL accept a full sized spare in the spot where the mini previously was. I'm one who also likes to replace those "doughnut" spares with the real thing

and have been successful in my vehicles with doing so. A salvage yard is a good choice to find a used steel wheel and given your vehicle is 13 years old, there should be a decent supply. If you are looking for new, tirerack.com carries some for many vehicles. A few years back I ordered new steel wheels for my Venture van and they were only $35 ea. not a bad price seeing a local supplier was charging almost twice that. Check your local Yellow Pages to see if there are dealers in your area that may carry new if that might be your only option. One last source that readily comes to mind is
www.car-part.com At that site you enter your vehicle info and the part you need and are taken to a results page which lists salvage yards across the country that show it in their inventory. You can also refine the search to yards closer to your location.
I would hesitate however on getting a used tire from a salvage yard. Refer to the first link I posted in my other post as they give some info on this matter. If possible it might be better to find an inexpensive, new tire to fill the need as it will probably be used as just a spare so appearance won't matter.
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