Vent Cover solution found
I was thinking the same thing.
Doesn't anyone reply????
Here's what I found about the vents on my Excella.
I've been blessed with original documents from previous owner and I've attached one related to the vents.
Vent Manufacturer: Fan-Tastic Vent Corporation
Vent Cover Part#: 1020
I searched online and found this business was bought by Dometic Corp.
Amazon sells these covers for approx. $44, I bought one and it matches up exactly.
Later, I found General RV (Michigan) sells these for $39+tax ($42)
Hope this helps you,