If you're fine with vintage/retro, the four variants of 122-key IBM Model Ms (https://sharktastica.co.uk/topics/m122_diffs) and the earlier Model F counterpart are the most obvious big 104/105+ keyboards.
would It be possible to change a model F keys with mx compatible?
The Boston is a 1800 layout board with two F-rows, currently the GB has been put on standby but it is an optionInteresting. My TG3 board is somewhat similar.