You gotta do a little grunt work man! I don't like telling people to "use their search-fu" but I didn't have to look through more than 2 pages to find these.
Just on page 2 of this forum is cassius's Arkham Origins Deathstroke thread where he is offering the pepakura files of the armor for free. (If you do that, I highly recommend supporting him by paying the $15 at the link also included in the thread. That's a steal of a price.)
And just a quick search of "Arkham Origins" in the Project Runs forum comes up with this thread. It is a little outdated, but you can always contact the maker and see if anything came of it.
Not interested in doing it, sorry. The other run barely got enough interest to make it worth it, it isn't worth the work just for one set with the other work we've got going. Your best bet are the pep files Vox mentioned or getting someone to do a foam build for you, there are some amazing foam versions of this costume that would cost way less than us doing it via 3D models and finishing work.
No worries Vox, I was in the hobby long before TSFX was a thing haha I may get my name changed at some point though now you mention it.