I was needing a case for hauling the Hitec X4 charger and found an ideal match at Harbor Freight. The X4 fits great with just enough room at one end for charging cables. The X4 sits about flush with the bottom section of the case, which leaves the top area to form a compartment. This was done with poster board, some reinforced vinyl tape for hinging it and some velcro sticky for clasp and pull strap.

No doubt the case would accommodate a wide range of chargers.