So, we decided to not have a courthouse wedding. We'll have a small get together and do it in a park or something for August 1st. Right now, it's difficult to obtain a license here in NYC (through the portal) so we're going to long island to get it (just scheduled it today) done. We already booked a one-way tix for Sept 1st. We're getting this ball rolling.
As far as your question: You'll have to see someone local. You can do it jamesallen.com but I'm not sure if you want to ship your stone. My wedding band was ordered by them and my girl's ring was make by a friend of ours.