Nvidia Shield TV Controller + Remote Stand All In One.
Steam Controller fits perfectly.
Nvidia has updated the design of the controller and remote in the newer versions of Shield TV so this design may not fit if you have the slimmer version of the controller.
Updated design, previous was not working well with only one of the peripherals attached at the time. moved the slot for the remote from the front to the back with an angle
MKII Tested and working