It is easy to make decals for a nameplate with an inkjet printer, and some clear inkjet paper. The simplest is just to do black lettering on the clear background.
If you have a graphics program that provides a negative or invert function, that makes an interesting decal. I type in black lettering on white background. I thin invoke the above function and the design turns into white lettering on a black background. The white lettering prints as clear, so when I apply the decal to the brass sheet, I end up with brass letters on a black background. I make the decal just slightly smaller than the brass rectangle so there is a brass outline to the nameplate.