Easy answer, go to tirerack.com and order a spare front rim and tire and a bag to keep it in (it's smaller and easier to carry and can be used on the rear if needed). Get a scissors jack, a hockey puck to put between it and the jack point, a lug wrench with 15 mm socket and you're set. Or, if you plan to have AAA or whoever put it on for you, forget the jack and lug wrench.
Not to confuse things, but I think Smartmadness is another source for tires and wheels.