JLCPCB would 3d print high-quality enclosures from a variety of UV resins: https://3d.jlcpcb.com/ https://3d.jlcpcb.com/ and decently cheap. The next best opti

JLCPCB would 3d print high-quality enclosures from a variety of UV resins: https://3d.jlcpcb.com/ https://3d.jlcpcb.com/ and decently cheap. The next best option is injection molding with PCBWay (or other similar provider): https://www.pcbway.com/rapid-prototyping/manufacture/?type=4&reffercode=TOP https://www.pcbway.com/rapid-prototyping/manufacture/?type=4... An alternative is a sheet metal enclosure: https://www.pcbway.com/rapid-prototyping/manufacture/?type=4&reffercode=TOP https://www.pcbway.com/rapid-prototyping/manufacture/?type=4... But 3d printing with JLCPCB is really the most convenient way unless you need a lot of parts (thousands) or the material properties of the UV resins would not be enough (high-temperature, outdoors, etc).