I am dong a 3D lap top cake and was wondering how I can achieve the detail for the lettering of the keyboard. I would rather not have to pipe the letters/numbers/symbols with royal icing. The keys are black and the letters/symbols are white/silver? I have looked for a white food color pen but have not been able to find anything. Any suggestions?

The cleanest way I can think of is an edible image of a keyboard. A local cake decor store in my town will make them and I live in a small town. Someone in Buringham has to. Sorry but that's the best I can come up with.