JL Audio 10W1v3-4 W1v3 Series 10" 4-ohm subwoofer at Crutchfield
JL Audio 8W7AE-3 at Onlinecarstereo.com
Amazon.com: Atrend 12JLX3SV JL Audio 12” Single Vented Subwoofer/Speaker Enclosure Compatible with WX & W3 Series Subwoofers. Made in USA : Electronics