I eventually replaced my fibers with Fitz Fibers. You can order them in the colors you want and they are a lot less brittle than the factory fiber so you can actually wrap them on the column and feed them through yourself after soaking them in hot water. I expect you'll have to pay for the new metal optic pins if that's the route you go and they'll still have the inferior, brittle fiber on them.
http://www.fitzfiber.com/store/