Amazon.com: Player Module, Audio Module Multi‑function Excellent Craftsmanship Reliable and Safe with Powerful Chip for MP3 Playback Audio for Decoding Development Board : Electrónica
Adafruit "Music Maker" MP3 Shield for Arduino w/3W Stereo Amp
Music Maker FeatherWing w/ Amp - MP3 OGG WAV MIDI Synth Player - Stereo 3W Amplifier , from Adafruit for €26.57
VS1053B MP3/WAV/OGG/MIDI Player & Recorder (CODEC) Chip : ID 1681 : $12.50 : Adafruit Industries, Unique & fun DIY electronics and kits