Diatec offers retro basic keycaps in gray and dark red.

Ah, remember the good old but dull grey beige PC days back in the 80-ies? Diatec launched Vintage Basic Keycaps, a replacement keycap set that converts a mechanical keyboard into a retro ambiance. 

Keycap set for the "Majestouch" and "Majestouch Tenkeyless" series equipped with a CHERRY MX switch. The main component is colored "gray," while "dark red" is used on some of the larger keys, such as the function keys, Enter key, and space key, as well as the numeric keypad. It can be converted into a keyboard with a "vintage color scheme that appears nostalgic, as seen someplace."

In addition, to create a vintage sense, we were meticulous about the typeface design, such as employing katakana notation for the kana engraving on the key tops. The total number of keys is 108, which corresponds to the entire size of the Japanese layout. Keycap extraction tools for replacement operations, as well as key components for stabilizers, are supplied. A kit costs 32.50 USD/EUR.