'Trash', as an aesthetic, is seen in many other type of media, including literature, music, art and more.
Researching trash aesthetics should include cross-searching related fields for other resources.
Trash Cinema Internationally
Exponents of the genre include: Lucio Fulci, Dario Argento, Mario Bava
http://www.grindhousedatabase.com/index.php/Main_Page - The Original Classic Exploitation Film Resource and Fan Community. Includes over 2000 reviews
http://theposterpit.blogspot.com/index.html - 'Showcasing the best and worst in sleaze, tease, and cheese since August 2006'.