Wow!
Nice Wagon.
A. How are the lights on the wreath powered - vehicle battery or what?
B. I like the guard dog too. He looks like he means business.
C. There are a number of places that can refurbish gauge clusters, Mr. Google can start you looking. Bob's Speedometer Service in Howell Michigan did a restoration of my gauges in the '48 Truck.
https://www.bobsspeedometer.com/1/120/index.asp
He does good work, but good work is not cheap. He stands behind the work - I had an issue with the speedometer they worked with me to get it resolved. Turn around time depends on his shop load, but was reasonable. He can make them look and work like it was 1957 again.
You should not have major issues with the gauges and sensors in the '57 since they are the late 12-volt gauges. Life gets interesting when you try to integrate original 6-volt gauges with the sensors on the F-134 (which can be either 6-volt or 12-volt).
D. Get a Kaiser-Willys catalog. They do as good a job of listing correct parts by year as just about anyone.
Just remember the First Rule of Jeep: What you see is what you have - trust your eyes, not what someone wrote down or told you.
Then, the Second Rule: Never say Willys would never have ___________________ (fill in the blank). They probably did, especially around a model change over date!