You could probably find a regular ol' desklamp at just about any department store that would have a gooseneck on it you could use. Some of the ones I've seen are pretty thick and seem as though they could support way more than just the lamp head. Im looking at your design and a flatpanel monitor minus all the random plastic shouldnt be TOO heavy, plus you have the hands to help distribute the weight so it isnt just resting on 1 point...just make sure that you dont make it too long as of course the shorter the gooseneck is, the more weight it should be able to hold without buckling.