At some point a seller (sorry, can't remember his pseudonym) tried to produce a kbt pure pro with the azerty layout.
See :
https://www.amazon.fr/KBT-Pure-Pro-r%C3 ... B00A2LLBVY
However sales were disappointing, and thus they are not produced anymore. You might try to get a used one by posting something in the french forum or in the marketplace.
I don't know of other small boards with built-in azerty layout keycaps, maybe other members will prove more knowledgeable in that regard.
There might be workarounds also: get a board with ISO layout and try obtaining azerty keycaps separately, but keep in mind that it's highly unlikely to be compatible with backlighting for instance.