Most components manufactured by companies are done by outside companies. Especially is this so on the automotive front. Manufacturers don't want to spend millions on design and application only to have it copied for someone else. To safe guard secrets, many suppliers get components made by a variety of outside companies and assembled by another supplier, so the full process is never completed by one manufacturer.
Alex once said that the components to make up an SLX pole come from a variety of countries and factories.
http://www.cleanitup.co.uk/smf/index.php?topic=125444.0You would have to identify 6 different factories in 3 different countries - none of which advertise their services for these exact products.
Consider Bosch Automotive. Many years ago when ESP was in its infancy both BMW and Mercedes were designing similar product for greater stability control. These systems could only be manufactured by an outside electronics specialist company. BMW accused Bosch of cross fertilization with regard to the similar product Mercedes was being supplied. There was a major issue about it until it died of its own accord, each side claiming victory.