Hi, I found this on amazon, it's cheaper that I thought.
Charging Case Compatible with Samsung Galaxy Buds 2 Pro, Replacement Wireless & Wired Charger Case for Galaxy Buds 2 Pro with Bluetooth Pairing Sync Button Large Capacity (Earbuds NOT Included)
https://amzn.eu/d/1Y2sYxA(Make sure to read the customers reviews)
Hope this helps.