One place to start looking is in the source code of the QMK firmware. They have subfolders for many keybaords, and most of them have a picture. github.com/qmk/qmk_firmware/tree/…/keyboards Most of them are hobby projects though, so soldering will be required.
Just an idea: you could attach the two halves of a split keyboard to a wooden board. The piantor is a corne-like split with hot-swap choc v1 sockets that has been designed to keep soldering to a minimum. Some soldering still required though.
What is the difference between the MX and the choc version? If I understand correctly, chocs also fit in the 14x14 mm plate holes that the MXs need. And since you’re hand-wiring, there is no PCB with different holes. Shouldn’t the chocs just fit the MX version?