Where buy battery Ubook?

I’m Demish, from Bandung, Indonesia. I have a Chuwi Ubook 2in1 8/256, CWI509. The battery is swollen and needs to be replaced. but at Chuwi’s official service center in Jakarta, it’s out of stock. while I really need a laptop/tablet for my work. where should I buy the battery? Thank You

Greetings. You will find spare parts on AliExpress.