Stopped by CW today and while we were there we looked at a high dollar 5ver (inlaws were there). They had an LCD mounted in it on a slide out base but they used two pieces of 1/8 inch aluminum with 1 inch lips bent on all four sides. Looked kinda like an end cap. In any case, they stood them up and bolted the 1 inch lip to the tv where the standard bracket would mount and the other lips on the corresponding sides bolted to the bottem and rear.
It is simple yet works so well. I hope it makes sinse. I did not have a camera today but when I make my brackets I will take pictures. Thanks Doug