Those are usually prints laminated onto MDF. The bevels are cut on an industrial routing machine and the edges are painted and sealed.
I'm sure somebody will be along any minute with a URL, there are several companies that make them wholesale and retail.
The only useful input I can add is that I recently had a booth neighbor at an art fair who had just stopped using the technique in favor or returning to gallery wraps. The pieces were incredibly heavy. Expensive to ship. But worse than anything else, they had so much weight and inertia that when they were being carried, the tiniest bump on an edge would create a dent that was very difficult to remove. Bumps that wouldn't even affect a gallery wrap could trash a panel mount.
They do look terrific on the wall, no denying that. But I think a Dibond mount is probably just as handsome, and as contemporary aesthetics go, just a little more hip.
