Well commissioning them probably won't happen cause of how soon it is.
Making them, you can go the cheap easy way, by making them with cardboard or foam.
Making them secure, you could paperclay, paper mache, dowels, or use something other than those that will make them sturdy. I guess just break them down into how you think it will work : D! Sorry if this hasn't helped out much : P, but goodluck!
Hail to the king, baby