I have a friend who lived there. She said Jim Summa at Summa Jewelers in Kirkwood 314-965-0046 He is on Argonne right by the tracks in downtown Kirkwood. Also John Zurbriggen at Rock Hill Jewelry (he''s particularly adept in Plat) on Manchester, between McKnight and Brentwood in the "hole" next to Trainwreck Saloon. A lot of the jewelers in town send their plat work to him. She thinks Jim Summa is a little better but said John is quick. 314-968.4311