Here is a softbox for LED panels that I like a lot. It is quick to set up and folds to a very small size. It produces a nice soft light. Plus, with an extra grid attachment, it allows you to have a soft light that is also very directional. This way you don’t spill light all over your location and don’t light parts of your scene, unless you intend to. Check out my video review below.
Here is where you can get the softbox and the grid