I just improvised on using parts from 3 different models of Ton's Ares V, 
HL vehicle, and Orion. The following is a very simple list of how I created it.
 
1- Print of Uncolored main tank parts from the Heavy Lifter.
2- Print engine parts from the 1:144 Ares V. (You'll need to make the diameter 
   smaller in order for it to match the HL. I also turned the engine connicle 
   inside-out to it is all white)
3- Print 2nd stage of Heavy Lifter. (Also built inside out).
4- Print pg. 2 of the HL Cover.
5- Use the top diamerter of the cone to create the second stage with a height of 5".
6- Build the LAS tower from the Little Joe III (Add windows and hatch)
7- The SRB's are from the Heavy Lifter as well. The only thing I did different was 
   print an extra middle section, cut it in half, and use each half on each booster 
   to create an extra segment.
 
Other that that, I just used a permanent marker for the markings, and added wording. 
I did all this by looking at the photo's of the SLS on NASA's website.
 
I hope that helps. If you would like to try building one off of the directions I 
provided, and add to, or make it simpler for others to enjoy, I wouldn't mind. I 
have only been building papercraft for about 6 months and just tried my hand at 
this. Thank you for your wonderful website as well. Sure enjoy the models.

 
Brian G