Sadly SE doesn’t really have a great fit subsite for my specific question, and the DIY stack exchange is mainly for home improvement. Thus, I post here.
I have designed a usb device and ordered and assembled the circuit boards. This looks ugly, and I would like to make an enclosure for it. DIY electronics enclosures are dinky, ugly and too big. I want a professional look. Sadly, I do not have an assembly agreement with a plastics factory. If I did, I would have a custom enclosure poured with sleek, black plastic. Instead, I will have to make the enclosure DIY before pitching the product to potential sponsors. My entire design could fit inside the USB plug shown below.
Credit: Amazon
Ignore the male plug, my design will has only female plugs. I want an enclosure for my device with very similar style and dimensions as what is pictured above, only black plastic instead of silver.
I have thought of using some kind of specialized pipe and cutting the ends. I have also thought about pouring the enclosure in epoxy but that would just be a mess. I have tic-tac containers I could spray paint but that seems a little less professional than I would like. Are there any opaque containers that could achieve such a look?