Thanks you've given me an idea. I've comissioned someone to tailor made a lunch bag for my gf before, maybe I can employ her help again. I just give her the design and see if she can make something.These are not cheap either - but there are pretty and firmly targeted at female photographers. Remember to account for shipping fees too.
http://www.etsy.com/shop/xcessrize?section_id=5238255
http://www.etsy.com/shop/bankgrrl