I am in the process of installing a larger Dometic refrigerator
in my “83 Scamp
and bought a brand new Dometic 123A upper vent on E-bay about a month ago. It is 8.5” x 21” and has never been installed. Photos below.
I taped it to the opening during the snow storms we had in Denver the last two weeks to keep the snow out. However, I found that since the new vent opening is above the belly band, it tilts back a little and the openings allow the snow to blow in the back of the frig. Not good, so I have to install the newer model of upper vent that is deeper and diverts the water back out.
If you are still in need of one, it’s yours for $25 including shipping. You can use Paypal, personal check or whatever works for you since the vent is of little use to me. I can't help you with the other panel though.
If you want it, just PM me with the shipping information.