Yeah, try searching for LM386 module.
Like this one: https://amzn.to/2KdvU7O
Or, how about this little Class-D module [just add pot at input]: Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302 : ID 2130 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits