[Suppliers] Investment casting

Fellow Orchidians, Could anyone suggest best suppliers for investment
casting/Lost wax casting plan & equipment? Total tools and equipment
supplies are required for a new jewelry plant being established.

Any suggestions/advice/feedback would be highly appreciated.
Important do’s & don’ts to be considered at time of establishing
such a unit would be highly appreciated.

Thanks a million in advance for any help.

Lalit Jhaveri