Welcome- I don't own a ZR, but you'll most likely need to order this part from your local Nissan dealer. You can also order from an online dealer, like Courtesy Nissan, but any discount might be eaten up by shipping costs.
I was able to get a cut sheet diagram and it shows that parts are 97130 and 97131 (left and right). Dealer was only able to provide right and left is discontinued. I was able to use part numbers and search ebay and found both.
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