Hello,
I buy this cheap radio with FM, Bluetooth and integrated amplifier
https://www.aliexpress.com/item/1005003277971294.html?spm=a2g0o.order_list.order_list_main.251.21ef1802KXccmH
You can add 2,1mm supply connector and 3,5mm link output connector.
On rear side is place for repro connector