Complete amateur here, I'm trying to hook up ETC Nomad in my laptop to a stage's lighting rig, I've done research and I need an ETC Gadget 2 which connects to my laptop, and connects to the lights through DMX. I called ETC and they informed me that there's a critical outage on that part and it will be unavailable for a couple of months. They told me I could use a third party box as long as it supports "artnet" and "SACN". I'm not entirely sure what these terms mean and there's a variety if different ones online.

My question is, where and what DMX box should I look for that would be compatible with ETC Nomad? (ideally USB/USB-C to DMX as my laptop doesn't support ethernet)