Custom Lobby Signs are usually made up with with a combination of layers. Layers consist of Backer panels, front or topper panels and 3D lettering which can be made from many materials and done in a single or multiple layers.
Due to the endless possibilities it's best to quote each job out as a custom price. If you dont need multiples layers of panels and/or 3D lettering added you can check out Plexiglass Lobby Signs and Brushed Metal signs for simple instant pricing.