hello sir,
i can do the model for this product, using solidworks software, and provide you with the 3D print file, to be ready for prototyping it
i looked at the mockup pictures, " the display should be up and under it is the PI circuit", and the enclosure should be designed to fit them in that position., maybe you just put them beside eachother for showing here, and i just saying my suggestion about how they should be placed, for saving the enclosure area, and so the materials used, and product cost
message me, if you need to start on this project, and i will need the layout dimensions or the datasheet of the display and PI circuit you have, so i design according to their dimensions to fit in the enclosure with ports.
waiting to hear from you,
regards