Before people start slinging off suggestions, let me explain.
What ideally I’m looking for one of either two options; A sign that upon clicking, opens a double chest GUI that shows random items selected from the list in a config file. Say you have all the different armour types, it would randomly pick one and give you it. Then, upon exiting, there’s a cool down for as long as chosen in the config until you can reopen it.
Either that or it’s a chest you open and the above things to happen.
This must also support modded items from different mods.