I designed this because silly me lost a couple of the M2.5 standoffs that came with the 7-inch touchscreen and I didn't fancy trying to find 2 pcs of replacement M2.5 standoffs. So if you are like me, and are in need of some supporting structure on the top side, this support clears both the flex cable for the display to the display driver board as well as allows enough space to comfortably insert a Micro-USB plug into the display driver board. The screw holes are pretty much intended so that you just screw the screws into the plastic (except for the part that mounts to the back of the display - that goes through and screws into the threaded mounting holes in the back of the display. There are 2 versions. The first file allows connection to both top and bottom USB ports (the micro USB port in the display driver and in the Pi itself. The 2nd version allows connection only to the Pi. I offer it up in case anyone else loses 2 standoffs...
You will need M3 and M2.5 bolts, I used stainless steel socket cap types.