javdirectshop have their movies organised by studio. (I also like this feature) Just right for Manufacture selection at the right.

Some example:
Moodyz: http://javdirectshop.com/shop/index.php?manufacturers_id=11&language=en
SOD: http://javdirectshop.com/shop/index.php?manufacturers_id=12&language=en
Waap: http://javdirectshop.com/shop/index.php?manufacturers_id=13&language=en

Quote:

My problem with those sites is that they have their choices arranged by actress and I tend to buy according to studio.