Hmm. I did not do all the characters in the Big Blue Book. Probably me shooting off my mouth before doing the work.
Still, I did do some of them, so they're all here in one document. I'm unlikely to be touching any more Champions stuff, but it's not impossible.
Some Hero Games Conversions to ICONS Assembled
It occurs to me that you can use whatever kind of conversion method you want. As long as you're consistent, at least the characters will be scaled to each other.