2009 Lincoln Town Car Wheels

I have a 2009 Lincoln TC with 235\60R\17 tires and stock 18 spoke aluminium wheels on it and would like to use a real tire for my spare. A stock wheel is far to expensive for me so I was wondering what other wheels such as Mercury, Ford or any other company's for that matter might fit. My wife and I visit family a few hundred miles away and after a blow-out and driving on a donut at 50 mph in traffic going 75-80mph I decided to change my spare. Thanks