Did you try to contact Amphion?
Amphion Creon Replacment Bass Drivers
I have a set of Amphion Creon 2's and one of the Bass Drivers went bad. I took one out and it's made by peerless. Looks to be an 8 inch with a QC number of 030217 Cat number 850628 and a serial that looks like 570254850628. Can't find them anywhere. Tried Peerless, Tried Amphion. Any leads?