(oh hey, love your art!)
Without hacks, you’ll need to use the ‘shuffle’ list function. Not elegant, but it works. You’ll have to write a `{variable = X}` for each possible value, and repeat that whole list wherever you you need another similar random number. If that gets unwieldy, you’re probably better off using the ‘arbitrary JavaScript’ hack and writing your own RNG function. Definitely an easy script to find/write if you go that route.