(will pay for consultation) Technical Fashion Designer for Hats

We are forming an eCommerce brand with hats as a primary part of the catalog.Seeking to consult with an experienced designer who can provide insights on design and manufacturing as well as draft the designs.We are open to paying for your consultation time. Insights on the following are a big plus:
1. Accessories - specifically baseball caps, the wider variety the better
2. Sustainable materials/fair trade labor