There is a article on the Bulletin Board about Caddis Cases found on a rock in the river (which I cannot find now) that asked about possible cased caddis patterns on FAOL...
http://www.flyanglersonline.com/flytying/fotw2/082304fotw.php
http://www.flyanglersonline.com/flytying/fotw2/011705fotw.php
http://www.flyanglersonline.com/flytying/fotw2/101005fotw.php