I decided to take apart my bike and clean it up, but now i can't get the cable housing that passes through the derailer through. I kinda cut the ends and frayed it but need to get a replacement. Is there a specific one or can i just buy something off ebay, I didn't want to pay 25 dollars for a cable installation and 25 bucks for a group. I need the shift housing for the derailers. Thanks in advance, if someone can link me to a place to buy it for cheap. Thanks a bunch.