I couldn't justify spending $90+ on the new bolt in power strip from Snap-On that includes USB, or the $60 model without USB, so I did some research and found an excellent alternative on Amazon for $18:
https://www.amazon.com/dp/B07N19QTVC/?tag=atomicindus08-20
What I like about this power strip is that it offers mounting tabs if you wanna screw it in place, it provides three 2.4A USB outlets for charging my phone & flashlights, and also that it fits more flush against the back of the tool box than the Snap-On one, which helps to maximize space. it also spaces out the outlets for wall adapters, which is also a shortcoming of the Snap-On power strip. The power cable is just long enough to touch the ground (4.5ft) and also has a flat plug on the end, which is nice if you keep your box against a wall with an outlet.
I mounted the power strip to the box with 3M double sided adhesive strips, just because I didn't wanna drill new holes into the box. You could easy center punch & drill new holes in the box to mount it, and gain a tad more clearance, but I was fine with the adhesive mounting solution.
I always try to avoid having to bundle up excess cable, so I went ahead & found a short flat plug adapter cable for my Snap-On 14.4v charger, and a 1ft Micro USB cable so I can charge my Streamlight flashlight: