Yes, ive also thought its this one... till I bought elite corpsman helmet and chest from ah, and only helmet is similiar (with white stripe tho). Nothing else is even close to this trailer set :/
Ah sorry mate. I was basing off the helmet alone. Let us know if you find it.
It may have been the Elite Corpsman but changed for retail. Or a set to be released later on. Words been going around that they may revamp the PVP sets to look better as well as add additional more "iconic" and "appropriate" looking armor.