Okay I follow the hills/the tabloids/gossip columns but I don't even know which one you mean! Do you have a pic? Try MTV - they often have "as seen on" fashion pages... or just google "Lauren Conrad name ring" etc?
I actually contacted the XIV Karats store where reportedly Lauren Conrad bought her ring, it's $450 for the ring plus shipping and insurance and they actually send you a form with all of the information they need and your CC number. I didn't purchase the ring yet, I'm waiting until I go back out to Califorina to look at the jewelry store - said it would take 2 weeks to make - if you email me I can send you the form. I hope that helps!!