Need Caddis nymph suggestions

Hi All,

I have been looking over http://www.flytyingworld.com/flyindex.shtml
for a Caddis nymph pattern. I am not finding anything I
like.

What I am after is the next best thing to reaching into
the water, grabbing a Caddis fly in its rock cocoon, pealing
the cocoon, and sticking the ugly, indignant little bugger
on a hook. Mainly, I am look for a black head with a cream
colored body.

Does anyone have a suggestion?

Many thanks,
-T