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I found this 2.4A 10-Port Fast Charger USB Wall / Desktop Multi-Port Charging Station [amazon.com] on Amazon (but from a third party seller) for $ 19.99 with code SYB2XNYD.
Seems pretty good for a 10 port 2.4A charger.
UNITEK 10-Port Fast Charger USB Wall / Desktop Multi-Port Charging Station for Apple iPad Pro/ mini/Air, iPhone, Galaxy, Nexus,LG, Tablet PC $19.99