Atmos Timber Matchingt to FXiA6

I have a customer that is looking to utilize some of his existing FXiA6 surround speakers and add in Atmos in ceiling speakers. Does Polk make a speaker that is timber matched to the FXiA6 speakers? I know it is not as important to have the surrounds timbre matched as the front speakers, but I am being picky. Thanks in advance!

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