I have a trunk unit that might work for your 54, it came with the 2 leigh compressors, private mail if you interest, i selling my 35 year collection of Packard Parts and literature, many at a loss.
Update:
I have the entire AC unit in Washington State, not hershey, and I will not be attending the PAC National in Rohnert Park, California , sick a few days in hospital
Lavine can help you, you need a good radio guy to drill and rebuild the right tuning knob. they can do it as mine was drilled to take a standard knob from Lavine.
https://classiccarreproductions.com/product-category/radio-components/
I have the bubbons I reproduct bank in the 1990, but no knobs.
Nice cars, I make offer on 1938 Ralston at hershey just after I met my wife, say around 1988. was 50K back then, as I recall it was red. with white rear interior.
I owned this sign for nearly 30 years in storage. pictures below, crating and shipping at cost; guesstimate: $140 for plywood crate/shipping and another $600 freight shipping.
I can delivery to Rohnert Park, Calif, PAC National 2023.
Great write up on the bus, I will try to take advantage of the bus in the future from especially from the Green Field to the Red field those walking there 15 or 20 minutes is to bad, there are always more booth to visit that I miss on Monday and Tuesday.