You got two very good answers already! Gotta love HN. A lot depends on the type of product. Even a generic split such as Industrial vs. Consumer can be a huge

You got two very good answers already! Gotta love HN. A lot depends on the type of product. Even a generic split such as Industrial vs. Consumer can be a huge differentiator. I build prototypes of industrial electronic devices in my basement; I won't touch consumer products because I just don't want to deal with designing to that kind of price point. For something more practical, especially if it's Consumer Electronics related I'd suggest going to Seeed Studio and posting on the forums there. If you want something local, google "electronics consultants" or "electronics contract manufacturer" in your general area.