The Cockeyed Valdez! Just for you! HA! Seriously, many CDC patterns out there or a small gray deer hair caddis should work.
I screwed the head up a bit but I used 240 Denier thread because i am tying saltwater stuff tonight so I didn't go 6/0 and just happened to have an #18 2488H TMC hook sitting around.
I even threw in some legs for you.... I would use a lighter dun CDC but I am running dry from the sulphur season.... Thread body is all you need.