Nike is one of the hardest brands to source these day. Nike themselves has been doing everything they can for their products to be sold through their authorized dealers/stores to ensure that only authentic goods are being sold. This is their move to counteract the rising trend of counterfeit products.
So far, I was able to locate only one drop ship supplier and with only one watch at hand. In case you are interested, here's the supplier URL:
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If I find anymore, I'll add it to this thread.
All the best! Cheers :)