I would buy your phone, but I don't really like the iPhone mini industrial design. The square edges make it a bit hard to hold. I also don't mind if it's a bit larger than iPhone mini. Pixel 3/iPhone 13 size is my limit.
If nobody makes something like this, I'll likely switch to iPhone 14 when it's released.
At the moment it looks as if there will be no iPhone 14 Mini. You don't explicitely mention "Mini" here, but from context it looks as if you mean that. Just a heads up (and the reason why I bought a 13 Mini even though my old phone was still fine).
If nobody makes something like this, I'll likely switch to iPhone 14 when it's released.