Based on this product's specifications, here are some alternatives and similar models
Travel case for sonic toothbrush TEESA TSA8009 — protective travel pouch for Sonic/Pro heads
Summary description:
Protective travel case for TEESA sonic toothbrush model TSA8009 designed to store and transport sonic or Pro brush heads. The compact pouch secures replacement heads during travel, prevents contamination and mechanical damage, and keeps accessories organized. Suitable for trips, business travel, or everyday storage of toothbrush heads and small oral-care items.