Where can I find a motherboard for Xiaomi M1S (Mi-1S)?

Question

Do it yourself

I have an M1S that served faithfully until it got wet in the rain, killing several conductive tracks and unmarked components on the motherboard with the assistance of electricity from a fully charged battery ...
The radius of curvature of the hands allows you to revive the phone by replacing this motherboard, but searching for Chinese flea markets did not give any result - everyone has had this Sold Out lot for a year already ..
Can anyone tell me where to get such a spare part for a Chinese once bestseller?
As an option, such a conditionally live phone with a broken screen would fit - maybe someone was lying around?
Forgive me for asking a junk question - for me it is rather in the aspect of "where to buy an unpopular spare part."

Answer 1

ebay usually sells broken phones for spare parts for cheap