How many of us are there? Owners of Dodge based RV's?

There are two fins already on it. That is what the wide u-shaped aluminum piece on the outside is for. Granted is should have more fins. I have seen at least one of the high-end units with lots more fins.

Maybe a 12v computer fan could be mounted over it.

The Pentium heat sink is also a good idea. Don't forget to use thermal paste.

This is why we should always carry a spare unit. RVs are often driven to very remote places.