The problem with that promo shot: it's not enough that the sheen appears to be different, or that it almost looks to be lighter-colored bricks atop a darker fabric, but the pattern is all wrong! That is definitely not the fabric we see on the finished suit!
Let's ignore for a moment that the black on the collar appears to simply be ribbed, with no print, shall we? Just look at the red, there's a huge difference between that and the onscreen suit. Promo shot's standard brick pattern:
http://i.imgur.com/fdWMz7j.jpg
Final fabric's alternating pattern:
http://i.imgur.com/StBftpF.jpg
Vertical rows show in the pattern in virtually every shot on and off the set. Close-ups and hi-res shots show the pattern to be what looks like two rows of vertically oriented bricks followed by two rows of smaller bricks with an alternating height. Rinse, repeat.
http://i.imgur.com/RmMOT4Y.jpg
This is a
really rough mockup of what I'm seeing (staggering is off, sorry if that hurts the eyes)
http://i.imgur.com/wuVkzc8.jpg
I don't think we're going to find anything off-the-shelf, though I've been keeping my eye out for good lookalikes