I need a designer for a quick 3d print project

We need to have a plastic sled that can take hours of sitting in direct sunlight. Very hot environment. We will attach two readers to the sled and connect the usb cords underneath. Each reader has a usb cord that will convert to one usb cord underneath.
Dimensions are 7inch long x 3inch wide x 1 inch tall.
ideally the readers would attach via a clip or something similar so that it can be quickly swapped. A rough sketch is attached.