Are you renting a car from the Orlando Airport? Maybe the rental company will have maps for you. I'm unsure in there will be places in the airport with maps. Maybe you could check the airport website to get info on the airport shops and then call one. I think the easier route would be to buy maps before leaving home, if you haven't already.
AAA's website, or Yahoo Maps. (I like yahoo better than mapquest for driving directions.)
BTW, *NEVER* depend on a rental car company to supply maps. Just don't do it. Most of the time they don't have them at all, and when they do have them, they tend to show only the most obvious routes to anywhere, and the scale is usually all screwy.
Some AAA offices will sell their maps to non-members; call to check if you're not a AAA member. They have a really nice Orlando map. (With Orlando, it's important to get a new map every year. There is so much new construction there that roads change quite frequently.)
I use www.randmcnally.com. My favorite thing about them is they have an option for your starting/ending point to be an airport. I found this when I was trying to get directions from the Miami airport and was told by an airport employee that the airport doesn't have a street address and she told me about Rand McNally's website.
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