I was able to find another replacement for the back side outside of the above link as I'm in the US. Found it on Aliexpress. Will report back after replacing it.
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[link|https://www.aliexpress.us/item/3256805410507101.html?spm=a2g0o.order_list.order_list_main.5.21ef1802iaIVkv&gatewayAdapt=glo2usa|Outer Cups for SteelSeries Arctis Pro Wireless|new_window=true]
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[link|https://www.aliexpress.us/item/3256805410507101.html?spm=a2g0o.order_list.order_list_main.5.21ef1802iaIVkv&gatewayAdapt=glo2usa|Original Replacement Headphone Outer Cups for SteelSeries Arctis Pro Wireless|new_window=true]
I was able to find another replacement for the back side outside of the above link as I'm in the US. Found it on Aliexpress. Will report back after replacing it.
[link|https://www.aliexpress.us/item/3256805410507101.html?spm=a2g0o.order_list.order_list_main.5.21ef1802iaIVkv&gatewayAdapt=glo2usa|Outer Cups for SteelSeries Arctis Pro Wireless|new_window=true]