JBL PRV-175 Marine Gauge Hole Mount USB Bluetooth AM/FM Stereo Receiver, Spa Bezel, Adapter Plate, 22" Antenna, 4x 6.5" 225 Watt Max 2-Way High-Performance Audio Speakers (White) w/Wire. Spa Bezel w/Adapter: With this sturdy ABS plastic mounting adapter plate, you can mount a gauge style marine receiver in an opening designed for a single-DIN (2" tall) radio.
eBay