My cab is a little unusual, in that the marquee is in line with the monitor, rather than 'sticking out'. Because of this I decided to use the same piece of glass for monitor and marquee.
I routed a groove left to right where the bottom of the glass sits. You place the bottom of the glass in, then angle back until it rests against the bottom section of the marquee. Then I have a hinged 'lid' for the marquee which can be lowered down, and the glass fits snuggly into another routed groove in the lid. The lid is then locked with a barrel lock keeping it secure.
I don't know what I'm going to use for a bezel yet tho...