I've designed this instead of buying one, and i wanted to try inlaying the boxing gym logo i train into the box. it worked pretty fine.
i've printed versions of this in PETG, PLA and ABS, aside from PLA, they worked fine till now, the PLA one broke on the hinge part, that's why i added a little bit more of support into the hinge part
to assemble it just use a spare filament, fit together the 2 parts and put it through the holes with about 5mm left on each side. heat the ends with a lighter and form something close to a nail head just pressing the heated filament with something (even the lighter) onto the piece. it works remarkable well, and i use this type of hinge with filament in a lot of my projects
I added a the original superior part with the logo of my Boxing gym, but also added a clean one if you want to print it clean, or even do a Boolean operation as i did with the original.
feel free to remix it and if you want the to check the project in OnShape you can do it in here