I have just got my self a Nodel Ninja only used on one day, I have a 5D not sure if it will take a 1D but might do, if you look at this link it has details on both those heads and others, it is also where I got my head from them. There is details of the nodel heads and link to the there site. I don't think the panosaurse head would be strong enough. The only other one that might to are the manfrotto heads, again details on those heads.
Hope that helps
http://www.red-door.co.uk/