Sprocket and Chain 520 Conversion

I am looking to convert to a 15 tooth 520 front sprocket and 48t rear. For those who have done this, where did you find a 15t 520 front sprocket that fits the 2013 Fz8? I've looked everywhere online and only found one on Yamahas website. I want to see if there are any other options for this sprocket for the 8.

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