Dear Colleague, I have a small business here in New Hampshire , OPTEK Mfg. . I do lapping ,polishing and shaping of optical materials. If you send your specifications and a sample of the material I would be happy to quote you a price. OPTEK Mfg. P.O. Box 495, Goodwin Road Enfield, NH 03748 PH 603-632-7895 Fax 603-632-4452 Regards, Jim Decato