ticwatch 3 pro back cover replacement spare part informations

Good morning,

I need to know if someone sell the spare parts of my mobvoi tickwatch pro 3.
On the back shell the connector on the bottom is missing (1 of 4) and I need the spare part.

Do you know a shop or a website that sell the back of my watch and also have the possibility to make international shipment?

Can someone help me?

Thanks.