I've done this on every bike I've owned but only payed 50 cents for them. Just goto a hydraulic shop. The ones I get are black so you cant even see them on there and I get em from the hydraulic shop 2 for $1. Thought about selling on ebay for $5 though
Hey!! .50 is WAAAYYY better than the 4.64 I paid! A buddy of mine said he got one at a CAT dealer, but couldn't remember the part #..
One thing nice about the CAT #'s... they should be the same no matter where you go.