You'll need to address the problem. Cabinet sides bowed out at the bottom and it fell out ?

Once you figure out the what. Then put it back in and figure a way to get it back to normal.

Don't panic. You'll get through this.

LTG : )™

A good cabinet shop should be able to fix it. You will need to remove the playfield and transformer to give them room. Expect extra bracing to be added to hold it square

here's a list of cabinet makers in St Charles MO

http://www.yellowpages.com/saint-charles-mo/cabinet-makers

I have not looked closely at how the bottom is held in to Dredd. If it is slipped in to a slot in the bottom of the cab, something happened to cause it to slip out. The sides spread, the bottom flexed, etc. If you look under the cab and do not see any broken pieces of wood and there is a groove for the bottom, see if you can get it to slip back in to place. If it does, you should be able to secure it by attaching a few small blocks of wood along each side under the bottom and screwing them in to the side of the cab. If the cab is not stable or is twisted, you will need to fix those issues first.

Take some photos of the underside of the cabinet. That will eliminate some of the guesswork.

remove any exposed fasteners, glue it and clamp it back in place. Whats the big deal? Take you 20 minutes. Tops.

Awesome

Any wood glue. Pipe clamps. If you dont know anyone with any; use truck ratchet straps. Use extra blocks of wood anywhere the ratchet straps or pipe vise comes in contact with the cabinet.

This should be a pretty simple fix. But I would throw away the old wood, assuming that may be your culprit. Is it warped, damaged? I would cut a new piece of plywood. While you are at it, may as well modify it to fit a massive sub woofer .

Rather than just glueing it in, I would add some brackets to secure it a bit stronger.

There is some good advice here. And YouTube is loaded with how to videos.

LTG : )™