[quote name='RIIIDAA' post='24000' date='May 12 2009, 10:25 PM'][b]google:[/b] retro fit cruise control
[url="http://www.conrad-anderson.co.uk/cruisecontrols/"]http://www.conrad-anderson.co.uk/cruisecontrols/[/url] was one result listed[/quote]
I fitted one of theirs to my Focus a few years ago. It was fairly simple job (take into account I'm a truck mechanic) and has worked fine except the cable that pulls the accelerator pedal down needs to be fitted and adjusted quite finely. Later drive by wire should be a lot better and even easier to fit.
Cost is around £300 I think.
I'm looking at getting one for the Fusion, or possibly swapping the Focus one onto it.
I love CC especially on long motorway journeys. We are thinking of going to the south of France in the Fusion next year,

so I'll have to get it sorted for that.