I bought this Amazon Basics NES Classic case and, after cutting a few pieces of the foam, it fits the Super NT and all of my accessories perfectly.

https://www.amazon.com/AmazonBasics-Carry-Storage-Nintendo-Classic-switch/dp/B0714R28X6

I am able to store the console itself, FXPak Pro, 2x 8bitdo 2.4g controllers + receivers, the power brick and power/hdmi cables. The case is sturdy and compact, which is exactly what I was looking for.

Hopefully this helps anyone else seeking a similar solution :)

Not sure if the NESPi case is a extact 3d scan of the NES mini but I do know that the SuperPi case is of the SNES Mini. You would have to take a gamble. It might be, they are close to the same sizes. I had both. https://www.amazon.com/AmazonBasics-Carry-Storage-Nintendo-Classic-switch/dp/B0714R28X6/ref=sr_1_1?ie=UTF8&qid=1536528701&sr=8-1&keywords=amazon+basics+nes+classic+case