Design Style, Fashon and Design for Gents Shirts

We are launching a shirt manufacturing unit for gents (especially youths), as part of it, we need different designs, and fashions in every month. Looking for designer, preferably someone studied fashion designing, even if non fashion designers with a unique taste about current styles and colors can also be a part of it. Should be able to design something that is easy to produce (not complicated, at the same time should be appealing and attracting along with simplicity) We are looking for a long time relation, someone to grow with us. we are posting some sample designs for your reference