Keeping water out of revoltuon mh engine air intake

The air intake is flat grid on side of the Motorhome. As far as I can find there is no commercial ready made solution. That is why I posted originally in Modifications.
Some kind of shield to fend off water spray during rain and rain while sitting still. Right now I am thinking a roll of duct tape while sitting still if it is going to rain but that stuff s not really great on paint if the sun is on it and that approach is half a.....