If you have a saw, that's probably a tool to start working with. Might not have a functioning keyboard afterwards.
I'm Swiss myself, finding Keyboards with our layouts is practically impossible. If your looking for something compact, you might want to take a look at something like the G80 compact versions. And keep in mind that CH_DE and CH_FR are practically the same save for the accent keys, which only have the position of 2 characters changed (same letters on the key, but just a switched position). Might give you more to look for.