Different banks for epoly

This is a bit obscure, I’m just playing around and don’t even know if I need this yet…

But I’m wanting to create different banks for ePoly. Is there a way of doing this? ie so I can change between different samples.
I have eSampler’s in Instrument Racks with a chain selector but ePoly -maybe not surprisingly - isn’t playing along with that.

Can you think of another way? Other than making one video clip containing all the banks and moving the start point?