I can’t even tell you how many times I’ve had to get rid of (or unsuccessfully try to repair) a pair of earbuds because part of them had frayed or broken. It sucks, particularly when the earphone itself still works fine. Those cables never last me. I abuse them way more than I should. At any rate, get ready for some modular earphones from Ironbuds, the first completely modular earbud: Ironbuds.
The site is still a startup and is using Kickstarter to raise some initial funds. The headphones are relatively cheap ($21-47 for some pretty good quality headphones) and seem to be made of high quality materials. The cables are even wound in a woven protective covering.
At any rate, definitely give it a look. If you donate to the startup, you can even receive a pair of earphones for yourself. I myself donated to the cause and will hopefully receive a pair soon.