Your new wheels will need to be in the correct fitment, it will need a PCD of 4x108. Also an offset (or ET) of 15-20... and centre bore is 65.1.
You can fit ford fitment wheels with 20mm spacers I hear...
But a VERY easy option would just be to visit
http://www.wheelbasealloys.com
...and on the left, search for all the wheels that fit your car and have a browse
