Yes, Omid is Meghan's Mouthpiece. He is tied strongly to Jessica Mulroney.
I think it HIGHLY unlikely that Harry would choose Lorraine Schwartz, jeweller to the A Listers attending the Oscars and the Golden Globes but with little UK profile, to do a "suprise" eternity ring. I find it very hard to believe her name would be on the tip of his tongue. Or that he even bloody knew who she was!