Hi there
I gave up searching and made an emblem
It is emblem which is at Kingdom Come by Alex Ross, very simple (as it sholud be,imho) and at different sizes (640*480 - 800-600 - 1024*768)
I think I'm going to work on hero(in)'s emblems... Anyway, here it is :
www.sabun.net/superman Just click the size you want to download blablabla..
Take a look at it: