I designed this 3 piece cover/case for the roar pedal bluetooth module to keep it 90% protected besides the screen area. Plenty of room for usb plug to still charge and for use of power button. Also could probably make your own screen protector as well. Good amount of depth space in front to insert a thin screen and button protector. Made with PETG 100% infill for strenght against temp changes inside the vehicle during different seasons. See pictures for assembly steps. 
1. Smallest cover over the bluetooth module. 
2. Second cover eith holes is the back plate. insert the module into this back plate.
3. Larger cover of the three goes over top of the inner cover and back plate to make it look a bit cleaner.
4. Add 3M double sided sticky tape or velco to the back and mount it whereever it seems fitting in yopur vehicle. Dont forget to wipe the surface clean before sticking!!! (i do recommend velco for easy removale of device for charging purposes)