you'd be best off filing a ticket to ask a staff member directly if you're not sure whether this would be allowed - i think it would probably be okay, but i couldn't tell you for certain. if you were to do this, i imagine the best place for it would be the art market forum.
I second filing the ticket, but I remember a board like this a while back. I believe as long as all the artwork is 100% yours, this is fine :)
Alrighty, thank you so much you two! ♥