Amazon.com: Sensor Pouch for Nike+iPod Sport Kit Sensor : Electronics
Apple Nike Plus iPod Running Shoe Sensor A1193 for sale online | eBay
Bean Pod 2 Pk: Universal Nike+ iPod Sensor Holder - Nike Plus iPod Sensor Cases, Works w/ All Shoes: 1 Red Sensor Shoe Pouch and 1 Blue Sensor Shoe Pouch | Amazon
Nike + iPod Sport Kit review: Nike + iPod Sport Kit - CNET