RandomPlus is your best shot.
Why would you expect more than one action ? A random generator with seed is nothing more than one action.
Ok, RandomPlus is not the same algorithm, but from the moment it gives you back the same "random" number when you use the same seed, that's all you need, don't you ?
In the absolute, it's just mathematic, you don't even need a third-part plugin and could implement it yourself in events.