It's easy to grab the Fluxx Dice and play with any version you want... but sorting the Fluxx Dice expansion cards out each time you want to switch versions is a drag. Here's a set of just the cards so you can leave them in any Fluxx version, and just grab the dice and play!
Get one for each your decks! (Don't forget to actually buy the Fluxx Dice expansion to get the dice themselves, of course!)