Outstanding job on that cabinet maxm!!!
Panasonic did make view finders for camcorders with their 1 1/2" color CRT in the 90's. The problem is the tube is fairly long at about 4". You might want to consider something like this:
http://www.hammacher.com/publish/719...promo=el_video
It's not quite as cool as using a CRT but would fit easily, and has an outstanding picture on it. It's not actually part of the watch band, and is just the little rectagular box.
Darryl