I have seen metal covers for the refrigerator vent on a VW camper.  I have had three of the plastic covers, all got lost.  I know, they are not supposed to be used while driving.  But what is supposed to be used to keep water out in a driving rain while driving?  So, does anyone know where I can obtain an already fabricated metal cover with a fastener, or do I have to make my own?  Thanks, mcneely