Apparel design and/or manufacturing of maternity wear

I'm looking for an apparel/fashion designer who will create the necessary design files that a clothing manufacturer can use to produce sample products. My product focus is on maternity wear, specifically nursing/breastfeeding covers. This designer must be able to take verbal and written instructions and create visual designs for review and corrections. They will then produce the necessary files that a clothing manufacturer can use to actually design the product. If you have contacts in the apparel manufacturing industry, or are able to manufacture yourself, this would be an added plus and could evolve into a separate project in itself. I would prefer to work with someone local (in Southern California) at least for the manufacture of the sample products. Large scale production runs can be outsourced internationally.