I’ve seen Brilliant Earth around for a while if you want lab grown, but I’ve never bought from them personally.
I’d also recommend a Philadelphia jeweler that ships pretty quickly and has always had good products that I have bought from several times, Steven Singer.
We bought ours when it first came out after several terrible windows laptops. It still runs like new and there’s hasn’t been any need to consider upgrading (m1 air in our case). The biggest complaint is once or twice a year I need a usb c to an adapter for an old device or something.