ZSA does sell a tenting leg kit that I believe should allow you to swap the thumb cluster screw for a leg, but I haven't tried it myself. It's only $24. Additionally, they have a 3d-printable file for a tenting leg that should work as well, if you happen to have a printer.
The Dactyl Manuform and Ergodox are also decent options for anyone looking for something like the ZSA Moonlander but don't want to deal with the Moonlander's issues. The Lily58 and Corne have far too few keys for my liking, but to each there own.