Not quite what you asked for but similar. Unfortunately the IE browser here doesn't allow me to post the pics, just the links
Take one of these :
https://plus.google.com/u/0/photos?t...83436295169415
Use a saw and a bit of gaffer tape :
https://plus.google.com/u/0/photos?t...83436295169415
and you get this:
https://plus.google.com/u/0/photos?t...83436295169415
Okay, it is work in progress but hopefully gives you an idea. Check my build thread 3 for the whole story