Sheffield622, you need to unlock the Golden Lotus dailies at the golden pagoda before you can see the mobs that this profile farms.
Pandamonium, they do not stop dropping after you do dailies. It's just all a completely randomized chance. You can try to average out your drop chance given with a few hours of farming one day and a few hours of farming another day and do some math and give yourself a rough estimate of what you should expect, but I farmed these on my rogue for a good 10 hours and received 6 keys and zero shards. I just started on my brand new 90 spriest and I've gotten one shard and two keys in about 7 hrs. It's the same way that when there are no hunters or enh shaman in the group, then it seems as though that's the only gear that ever drops.