Hey, that's the case I'm gonna use!
I'm getting it here though:
http://www.directron.com/da10bd.html
(not a plug for directron, it's just local to me.)
I can't see the pics, but from what you've said...
You could weld or bolt a couple of U clips to hold a plexi-res against that side panel.
I think it's a really great idea, it even makes me want to expand on the idea and turn that window into a bong!
but I have something else in mind.