Found my way to this forum via a Google search about fitting rear parking sensors to my new Focus, and found this brilliant guide.
Subsequently, I've just ordered a silver rear sensor kit from Amazon for £15.
Just bought my Focus Titanium, and it has most of the 'toys' except for the rear sensors. Didn't realise it was a relatively straight forward job to fit them, and its given me the confidence to sort it.
Your welcome Marc , and welcome to the forums