Check out the IEM aftermarket cables thread in my signature if you're looking for a cable. Microphone ones are annoying. Not many people at all offer them. My recommendation is to get a regular IEM cable, or use the one you have, and get something like this: http://www.amazon.com/BlackBox-C135-Headphones-Smartphones-Blackberry/dp/B008JNZNCK/ref=pd_cp_e_1
Their are a bunch of adapter cables that can give you the functionality of volume up or down and a microphone, but finding them in an IEM cable is difficult. The only times I've seen it from some of the custom cable makers is where they deconstruct a cable that has those features and then attach it to the IEM cable they make. Overall, getting an adapter like I mention is the best way to go as if it breaks you get another one and you don't need to replace an IEM cable. The volume rocker will only get in the way of your cable staying in it's best condition possible. Adding something in the cable gives it weak points and may mean you need to replace it more often. That's why I prefer my cable to only be providing audio to my headphones, not to a microphone as well, I use a Monster microphone adapter to have a microphone on my iPhone while I use my CIEM's.
Edited by kenman345 - 3/17/13 at 7:29am