This site has lots of Nike, Adidas and Asics footwear.
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Their website states 'We guarantee that shoes we sell are 100% genuine and authentic!' International shipping is offered and you do not need a tax id to purchase from them.
Link hidden: Login to view has a good range of Adidas and Nike footwear and they are located in Australia so shipping prices should be reasonable. They also have a 5 star rating in the Salehoo directory.
You may like to have a look at this wholesaler. Link hidden: Login to view They have shoe closeouts that include Nike and Adidas footwear. They have a 4 star rating in the Salehoo directory and ship internationally.
Link hidden: Login to view is a supplier of athletic overstock and floor sample footwear. They have a 3 star rating and ship worldwide.
I hope this helps and you find a good supplier for your business.
All the best