You can even download a CAD model of the gear you want & scale it down to the size you're looking to use, and then get it made from shapeways.com or find an SLA printer or something. Source: over 2 years ago

I used custommade.com for another style ring recently. I was happy with the pricing, service, design, and wait time. It will take about 3-4 weeks for them to take it from design to completion but any other service is going to be around the same turnaround time. Source: 11 months ago

Surprise her and do something custom. I'm making a ring right now with custommade.com and happy with the process. I've changed my mind twice and they've been super patient. Source: about 1 year ago

I loved the concept. A company like custommade.com (I have no affiliation BTW) could be used to design and make each ring according to the person's preference. (Heck might even be able to get them to offer a discount to the 20 volunteers so they can do some marketing off of it). Source: about 1 year ago

At first I was going to have the entire ring customized through custommade.com, but after several failed CAD attempts, I truly think the ring style I want is too complex for them to replicate even after I have given them many photos and interactive videos from several different angles of the exact ring I want. Source: about 1 year ago

In addition to a jeweler or etsy, there are some websites that are specifically set up for custom jewelry. I used CustomMade for my fiance's ring, and we both adore how it came out. You send them various ideas and tell them what you and they walk you through the process, step by step. Source: over 1 year ago