Labelled index buttons for faucet handles

I'm looking for a set of fittings (lavatory and bath) that have hot/cold (or H/C) labels on the index buttons of the faucet handles. Found Delta Botanical and Kohler Fairfax so far. Any others to look at? Or can I simply replace the blank index buttons on any new fittings with 3rd-party labelled ones? Any info appreciated!

Most faucet suppliers have a line of faucets that have hot and cold index buttons "Traditional" (depending on how much your willing to spend). Rubinet, Grohe, Cabano, Perrin and Rowe... just off the top of my head.