I started out building my own (story for another account) but now that TEX makes the Shinobi [0] it is my daily driver. There are some split mechs that have been modded [1,2] which are closer the Dactyl, but that would definitely be a custom job.

0. https://tex.com.tw/products/shinobi 1. https://www.reddit.com/r/thinkpad/comments/hz8flk/ergonomic_... 2. https://geekhack.org/index.php?topic=82599.0