Not sure what are you are in but we bought ours at Shane Co. They're pretty reputable and I've purchased a lot of Jewelry with them throughout the years, we actually drove 4 hours to my home town to get them for this reason!
We got my ER and will be getting my band from Rosado's Box on Etsy! They also have a brick and mortar store in Chicago, so they're not fully online. I'm in love with the quality of my ring, and they make everything in house! And they have men's bands as well!
FH is getting his 3D printed out of titanium, picked the webiste, and is designing it himself so I'm not much help here 😅
My fiancé wants a pretty specific carbon fiber ring (what he originally wanted can't even be made... that specific 🤦🏻♀️), which isn't super easy to find, but we're going with Titanium Buzz. They're online and have an actual store local-ish to us in Michigan.
My husband doesn't like wearing rings, which is completely fine! He does, however, wear it for special occasions or when we go out (dinner, shopping, etc.). He does not wear it for work at all because he is a mechanic that works with heavy duty machines so it would actually be very dangerous for him to wear his wedding ring. Because of all of these reasons we just got his ring from Amazon and then a rubber one as well from Amazon I was considering buying it from Etsy, but he saw one that he really liked from Amazon. His cousin's husband actually got his ring as well from Amazon.