Suppose I were M and having seen this thread, I would order a couple of thousand of those blank keys in different shiny colors right away. Fanatics would be able to specify color & engraving, put their orders in through a separate section of the website, pay upfront including posting & packaging (a small envelop would do perfectly) and shortly after have their own customised keys for their remotes.

Eventually they might even be traded at a premium through this website.

Happy pimping!

Stereo: ML360s, ML390s, Meridian 800v2, Chapter Audio Sonnet, Preface & Couplet 400s, Shunyata Hydra, Vivid K-1s