Whatttt ? Lol that is for 009S ? Woaaa.
Does that means you advices to call up your distributors or dealers and let them buy in that you are using it with Stax amp ?
surely it can not be a cheap repair, the price refers to a pair of drivers for 009, not 009s, unfortunately both channels are dead.
The Stax did not ask what was the amplifier used, but only because the 009 were not under warranty.