Refrigerator cooling fans

[Fred Bellows]

So, I think I'm hearing that the older Dometics just don't work too
well when it's really hot. I live in Phx and plan to travel all over
the southwest, in the summer. We're talkin' over 100 most days. It
seems like I should either buy a newer unit (but they're amazingly
expensive!), or resign myself to having an ice chest on the floor of
the kitchen, to have truly cold drinks. ? What about an electric-only
"studio-apartment fridge" that would fit in the same spot. I would
have to run it off of the inverter while driving and dry camping
(unless the genie is on), but it seems like it might get fully cold.
And I could seal up and insulate the existing fridge intake vent
panel. Perhaps install a fan to circulate interior coach air to back
of fridge. These fridges are only about $200. Has anyone tried this?

Thanx,

Fred Bellows
90SP
Phx, AZ