For the minibuns, I would just take the front half of the pattern and make it for both front and back. Use the markings in the front for where to add the elastic. You could order a minibun from a WAHM if you wanted to see if there is any difference in size between the front and the back, but you would only need to do that if you wanted to make it EXACTLY like the minibuns. IMO, there are so many variations in diapers anyway, doing my method would be close enough to the original idea to be functional.
And yes, they do include instructions for the wrap. I believe they also include them for the cuddle-in-one but I would have to look.
It's a great pattern. I actually used it to make pocket diapers for ds.