Amazon sells generic ones.

Something like this should work:

ANATYU Compatible withSmartwatch Charging Dock Cables Charger for Willful SW021 ID205L IP68 Smart Watch (Black/White) https://smile.amazon.com/dp/B08T1LLDQJ/ref=cm_sw_r_cp_api_glt_fabc_PKSPR5WX7N9N2SVQTKS0?_encoding=UTF8&psc=1