Dye painting sounds like the better option in general. Less likely to wear off of the fur anytime soon, too. Not that I've seen anything like that on your airbrushed ones, it just seems like it might happen!

I'll throw together a diagram at least and throw it up, should be able to get that tonight before I sleep. And yes, 120 USD will be fine. How do you want to handle payment for this: all of it now, or how much when? And are they any other details you would like, or questions about it?