I needed a wall outlet cover for my PIR and Si7021.
This will fit Biltema 46-906 double-paddle switch, with minor modifications, you remove the springs and electrical switching parts. Cut away some of the white plastic that was holding the double-paddle in place (easy DIY task)
Then fasten the PIR and Si7021 with hot-glue to the 3D printed part on the inside, as there is no room for screwing this together
I usually print a skirt around to ensure enough melted filament to get through my hotend.
no need for support to print this.
I used white PLA for printing