We have spent several hours looking for a wholesale supplier for '7 for all mankind' brand of jeans, but unfortunately we are unable to locate any that are suitable. This product is sold through authorized distributors only as stated in their website 'The brand is currently sold at its owned retail stores, Link hidden: Login to view, luxury department stores, and high end specialty boutiques in over 80 countries throughout the world.' (here's the link://www.7forallmankind.com/about_company.html)
We suggest that you contact them directly and ask for their authorized distributors or inquire how you could become an authorized distributor yourself.
We were able to locate a suitable supplier for 'Crazy and Young Age' brand of jeans. Please check them out:
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Hope this helps. :)