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.
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?