Additional chime for Smart-doorbell 3

[RogerK]

I have Smart doorbell 3 and require a second (repeater) chime for upstairs. I live in Scotland. Where/how can I acquire a simple chime, without the bell push, compatible with my Xiaomi doorbell?

 

[orit.na]

I found it on Aliexpress:
Mi smart doorbell 3 reciver
(Btw it's called "reciver")