How can I purchase a replacement charging case for AirPods 4 with Active Noise Cancellation?

I recently lost the charging case for my AirPods 4 with Active Noise Cancellation and want to buy another. I want to buy an official Apple product and not a knock off. I can only seem to find the option to replace the AirPods 2 pro charging case. Is it possible to buy an AirPods 4 charging case through Apple?