you can get the inner cage, i believe the outer is permanently attached to the derailleur and not replaceable. https://www.sram.com/globalassets/document-hierarchy/spare-parts/spare-parts-catalog/2021-sram-spare-parts-catalog.pdf there are pdfs on sram site with all the parts numbers.
I'd be very surprised if that cage couldn't be swapped, it's removable in every other SRAM derailleur I can think of.
@Netakure started
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you can get the inner cage, i believe the outer is permanently attached to the derailleur and not replaceable. https://www.sram.com/globalassets/document-hierarchy/spare-parts/spare-parts-catalog/2021-sram-spare-parts-catalog.pdf there are pdfs on sram site with all the parts numbers.