That's so awesome. Amazing initiative, dude.
I write some series here on Tapas and I passed this post to my art partners that don't use the forum.
One of them, Guilherme Grassi, asked when you'd expect this collab to happen, because he recently broke his wrist and is recovering. Still, he'd love to do it if it's a little bit in the future. Here is our series together (all art and colors by him, except for #17):
(To contact him, please DM me here or in my e-mail address, jpnakashima@hotmail.com . He knows English, but not fluently, so I'd be a middleman if that wouldn't be a problem)
XXXXX
My other partner, Felipe Sato, would also love to do it and he's ready right away. We have two stories together, in which he only does linework, so beyond that I'll leave his Behance page where you can find some of his own coloring and samples.
https://www.behance.net/satofelipe033c
His e-mail is satofh@gmail.com (and he understands English better haha)