A focus head should work. I am planning on using the FRPP Focus head. The only problem is the timing belt tensioner. The Contour uses a larger tensioner that sits in the center of the head. The Focus uses two smaller tensioners that sit below the cam gears.
I'm guessing that you may need to drill and tap new holes in the Focus/Escort head to get the Contour timing belt tensioner to work.
HTH,
BP
