If you want something really cheap you can use a file sorter - https://www.amazon.com/Sparco-Sorter-Compartments-Black-SPR11876/dp/B0033UJ6HW/
And either a power strip with the included chargers or something like this - https://www.amazon.com/Sabrent-Family-Sized-Charger-Technology-AX-TPCS/dp/B00OJ79UK6/