“Better than Bullion” makes a ham base that is in a glass jar. I’ve used it when I can’t find a ham hock at the store. Find it in your soup and broth aisle.
Don’t really know what would happen to it if not refrigerated, though.
Thanks for that
Orrington Farms makes a powdered broth base with ham, beef,or chicken flavors, and it actually can last a long time without refrigeration.