I know that a site has a wide variety of such products

http://www.sourcingmap.com/ipod-speakers-c-983_1196.html

um.. actually i never use these, the point is choose a right headphone, the headphones are best appreciated alone. but these speakers are ideal for social settings where you want to share your tunes with a few others or when you’re milling around your hotel room getting ready for a night out on the town.