Small update:I got some ISO-keycaps from 4sStylZ and did a testfit on a raw PCB. All seems good!

In the picture, the switches are only put in to place, no solder or plate, so they are not alligned properly.

Two of the mounts i was hoping to be able to use will not work. The switches is to close to the hole, so there is pretty much no room for the head of the screw.
You can see the mounting holes I will keep in this picture.

Cheers!