You can pay for confidentiality, exclusivity and quality in the parts you buy off-shore if you so choose. It will all be reflected in the price of the part. I don't think the timing of the ebay manifolds was a coincidence. There was a business decision made in the beginning to capitalize on some short term opportunities.
You guys should consider the following a fact of life.....
Innovators, creators, and craftsman are not generally financially successful with their products. They have too much pride and emotion attached to them. Businessmen succeed because their pride and emotion is tied only to the money made from the sales of their products. The successful innovators have a business partner.