Here are the parts I found for replacing the head unit for a 2013 Ford C-MAX SE
Dash Trim Kit -
Metra 99-5833B
or
Scosche FD6203B
Harness-
Maestro idataLink HRN-RR-FO2
Steering Wheel Interface-
Maestro ADS-MRR
Antenna Adaptor-
Metra 40-EU10
Panel mount USB socket-
Powerbeast Square USB 3.0
Be careful when looking for head units, you need one that is compatible with idataLink , or you will not retain all the steering wheel controls, and may lose other features. Happy modding!