If I had seen this earlier, I would be very interested. I probably have one that would fit what you were asking. Sadly, I only joined the community in late June.
Also, as a writer... 60-40 sounds like a very good deal for me imho. I mean even when I first offered my collaboration to other artist, I offered 70-30 or 80-20 because I know how much work is needed. But then again, that's probably because I just love writing so I don't mind the smaller cut at all.
Honestly, I have tried drawing. So, in my opinion, writing a story is actually quite easy compared to making a comic. I mean, a writer can produce a story, background, characters etc without any pressure of having to follow a set of guidelines but an artist who will adapt that story into a comic have to think of those whenever they work on it. You design a character, but if the author felt its not potraying the character enough, you'll have to redo it. At least, I would ask the artist to redo it. Maybe that's another reason why I'm willing to give a bigger cut, to compensate the artist for my willfullness
Anyway, just my 2cents. Take it with a grain of salt?