MESO-12 - 3000 Watt 12 Inch Car Subwoofer - CT Sounds – CT SOUNDS
Buy Wholesale China Professional High Quality Vent Type Vehicle Speaker Enclosure Sony 12 Inch Speaker Empty Box & Speakers Box at USD 12.66 | Global Sources
Dual 12 Inch Car Audio Vented Sub Box Ported Stereo Subwoofer Speaker Enclosure - Walmart.com
Best Buy: Metra 12" Dual Ported Subwoofer Enclosure Black TCPSP-212
Pioneer A-series Shallow-mount Pre-loaded Enclosure (12-inch Subwoofer) in the Mobile Audio department at Lowes.com