Here are some pointers that might help you in this regard.
• As you are manufacturer you should go for a service that provide shaping and sizing as per your requirement. Moreover go for the company that is experienced in this field.
• Make sure that the company you have selected uses up to date techniques and machinery in their application. For example uses state of art piezo ceramic machining and dicing equipments in molding and shaping applications.
• You can also visit the site of such companies to determine their caliber and infrastructure.
• A company that gives importance to research and refining their capabilities to devise innovative methodologies also forms a good pointer on your selection list.
•Many times it could be possible that you are not able to select the right material for your application. In such cases utilize the services of companies that have professionals to guide you on material selection.
Now you must be thinking as to how to find such service providers. In this technological age this is not difficult, just search the internet about such services and you can find various options regarding it.