Best Buy: Dual Universal Bluetooth GPS for Most Bluetooth-Enabled Devices XGPS150
Amazon.com: Dual Electronics XGPS150 Universal Bluetooth GPS Receiver for iPad 2, iPad, iPod touch, iPhone and Other Smartphones, Tablets and Laptops (Discontinued by Manufacturer) : Electronics
SkyPro GPS Status Tool - Apps on Google Play
Dual XGPS150A Universal GPS Receiver with 12-30VDC charger
XGPS150A Multipurpose Universal Bluetooth GPS Receiver with Wide Area Augmentation System and Portable Attachment GPS Navigation - Newegg.com
Dual XGPS150A Universal Bluetooth GPS Receiver for Mobile Devices | eBay