Search for the metal variant of the nurgle
DP on ebay. Or get one of the nice 3rd party models with wings like this guy for example
http://hitechminiatures.com/morbid-angels/88-28-mm-gorguts.html
Just don't buy Finecrap, the chains will break and it will be full of bubbles.
Depending on your playgroup there's always Mortarion of course, but I think he's pretty mean for casual games.