3D printer files for rear air scoops

[chook12]

Hi all.
I'm keen to try out rear air vent scoops (ears) on our van and am searching for .stl files so I can print some out. Don't know much about the tech involved but I've enrolled in an intro course at the Makerspace this weekend aiming to leave with a gauge pod for a tacho. Have search thingiverse and other repositories of files and there is a fair bit of T25 stuff available but I can't find ears. I guess I looking for a benevolent person who is willing to sacrifice some time and energy to provide the Club with opportunity to make their vans even cooler. It was so hot here last summer that we couldn't go faster than about 80kpm on the open road when we set off for a trip. It was over 40C that day. We felt quite vulnerable with the trucks wizzing past. If anyone can help it could be that many of us will thank you.   
Anyway, just an idea.
Thanks.

[Aidan]

is your radiator the thicker one and are your deflectors intact and the fan working ?

or are you air cooled ? in which case is the tin ware all present and sorted