SunValleyTek via
Amazon.com has HooToo 40W 7.8A 4-Port USB Charging Station w/ OTG Port (HT-CT01) on sale for $9.99 - $5 promo code HDIE3EZO (apply at final checkout) = $4.99. Shipping is free with Prime or if you spend $35 or more.
1x HooToo Charging Station
1x OTG Cable for Android
1x Detachable Power Chord
User Guide