A couple of weeks ago I lost the cap (earbud cover) to my apple in-ear headphones. Probably not worth the $40 I paid for them, but a lot more comfortable than the ones that come with an iPod, so I was disappointed to find that apple did not sell replacement caps.
Googling one day, I stumbled upon this page which indicates the ear sleeves from some high-end headphones would fit the apple headphones. Hooray! I opted for the more permanent flex sleeves rather than the disposable foam sleeves recommended there, and now they’ve arrived from amazon I’m pleased to say they fit, and work great. Makes the headphones have a lot more bass too. Maybe too much?