There are a few ways to put Facebook on the header but this site http://www.parboldfruitandveg.co.uk/
has twitter in a Widget that is on the bottom middle widget and has live feeds from twitter.
This one is called Wickett Twitter Widget
Is there anything like that for Facebook. The idea being that the (few) latest News Feeds are shown embedded and link to the customers Facebook page.
I have used Simple Social Icons but that is not what this customer wants.