There are a few people who use an Aeon minimote as a wall mount, but not many, because, as you mentioned, it’s just not the right shape.
There are much better choices in the remotes FAQ. In particular, remotetec makes a very nice eight button flatback device which can be used as a wall mount or on a tabletop. It’s smaller than it might appear from the pictures, it is about the same size as a one gang wall switch. Each button can be tap, double tap, or long press so you actually get 24 different functions out of it.
Available on both US and UK Z wave frequencies. 
The SmartenIT 3 toggle also makes a nice wall switch.
Again, both of these are in the button FAQs.