I have definitely seen a shot of Dooku turning away from the funeral. (it used the shot of him leaving the arena battle on Geonosis) However I don’t have a link for you.
You could try searching the prequel radical redux thread, I think it was there that I saw it, but that was years ago.
Thanks for the hint!
I found a trailer by TheAlaskanSandman. You mean this?
https://originaltrilogy.com/post/id/1361116/action/topic#1361116