We were fortunate that
our 1956 Krefft works - it just needed to be cleaned up. We did need to track down the "wand" that allows it to switch over to electric (although we never use it). It took awhile...but we found one. But that was in 2007-2009.
It might be helpful to have a picture or model number of your fridge to help narrow down the parts you are looking for. There were several different models & sizes - generally, the sizes were relative to the trailer size. You may have to get a second fridge to Frankenstein one together that works from two that don't. They're out there, but pretty hard to come by...good luck!
Shari