They're really strict about selling online, no webshops, no listing prices on blogs, etc. I also don't know what is going on with their menswear lately, unless I'm mistaken, they didn't produce much this year - only unisex pieces in mens sizes. If you're into the aesthetic, the quality of their stuff is wonderful. My wife's outerwear is mostly from A&S.
They have a list of stockists online: http://www.arts-science.com/en/shoplist/stockist_list/