Stranger - Wrong Zeta

Hi! I messed up and applied the wrong zeta on my stranger by mistake. I meant to apply his unique, and accidentally did his second special instead.

Is there any way I can get these zeta mats back, so I can apply them to the unique like I meant to do originally? (Help my obi-wan kenobi, you're my only hope)

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I'd be eternally grateful! 

Thanks,