There is, but it's pretty rarely found on its own, I think. It is conical -- smaller in front than back. You can see what it looks like in my review of the 645Zi on YouTube:
You can see it's a rare item from the price asked: $29 for a tiny piece of plastic... Keh is a very good seller though!
Cheers!
Abbazz
__________________ Il n'y a rien dans le monde qui n'ait son moment décisif, et le chef-d'œuvre de la bonne conduite est de connaître et de prendre ce moment. - Cardinal de Retz
Thanks, guys! I'm too cheap for a $29.00 hood, so I bought a rubber one & cut off the outer ring. It seems to work OK. We'll see when I develop this roll. "Matthomas" - that's a great review & I liked your other posts.