E.A.
Go to www.Etsy.com, specifically www.tvtrayart.etsy.com, www.bibbidibaubles.etsy.com, www.lilybaubles.etsy.com, and www.mcfarlanddesigns.etsy.com. Or you can just type "custom photo jewelry" into the search box and hit ENTER (that's what I just did). Since this site is an online marketplace for handmade items, the sellers typically LOVE custom orders and are willing to work with a buyer if he or she has a time or budget constraint. All you have to do is "convo" the seller and let them know the details!
Have fun and good luck!