I have some of those sitting around as well. There is a more recent company, DVL Design LLC that makes a similar product. Unlike the Quality Products Co units, DVL design uses 1/32 thick acrylic so you don't get as much of an aquarium effect when you look through them. The DVL signs are engraved into the acrylic, but instead of different colors applied to the engraving, they use colored LED's as light sources. This limits the sign to all one color but they are very well made. The signs include a photo etched stainless steel frame to simulate the neon sign support structure. They are still only practical for large HO scale windows. Most of them require a lot of space above the sign for the LED light source, so be sure to download and print out the templates before choosing one.