http://www.wowhead.com/item=14966/gl...plate#comments

I've decided to farm parts of this set and thus I started with the chestpiece. I recommend the tips given earlier to go into AQ20 and keep killing Qiraji Gladiators guarding the gate to Moam's room without engaging the second boss General Rajaxx. Their instant spawning allow effective farming so make sure you got loads of bagspace.

Like with all farming, it's about patience or luck. I got the Glorious Breastplate of the Bear after 40 min killing those Gladiators with my enh shaman.

Now I'm off to keep farming Alcaz Island and Rabid Shardtooth bears in Winterspring for other pieces which is far more tedious...

EDIT: I had another chestpiece Glorious Breastplate of the Monkey drop from one of the Strashaz nagas. It's hard to say how many clears, I've been grinding the island for five days, spending roughly 1-2 hours per day there. Still no sign of other Glorious pieces though.