new s-pen tips

I hope i am posting this in the right spot. I bought my note 4 secondhand, so i dont have the replacement tips that come with it. Everywhere i look online, the packs are either all black or all grey, and i would prefer to buy from amazon over ebay, but i know the oem pack comes with the black and grey tips, for protector or no protector. Does anyone have a link for a reputable source for replacement tips? I have a black one now and the little rubber bit is falling off. Much thanks!

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