Based on this product's specifications, here are some alternatives and similar models
Protective silicone case Tech-Protect for Apple AirPods 3 — Blue
Summary description:
Silicone protective case by Tech-Protect designed for Apple AirPods 3. Made of flexible silicone to protect the charging case from scratches, minor impacts and dirt. Precise cutouts keep access to the charging port and pairing button; slim fit preserves wireless charging compatibility. Easy to put on and remove, practical for everyday carry and travel.