The TDA2003 chip can be dropped out of the old radio or bought on the radio market.
The rest of the details as well.
Here is the amplifier circuit:
The amplifier is powered by 3-12 volts.
The sound source may be a player or a telephone.
This circuit can be easily assembled by wall mounting.
My design fits in the casing of the music angel speaker.
Here's what I got:
I did it very sloppy, but I think that you should do better.
You can also, if desired, make an operation indicator, a toggle switch and a charging port.
Here is the speaker:
I recommend putting a capacitor between the two contacts (I set it to 47 uf).
Thanks for your attention.