I was able to get all of them (well, the wild ones), but I went looking fairly late. The Lofty Libram was heavily camped but I managed to grab one.
-Cogblade Raptor seemed fairly common, but then not many people visit Outland these days. Quick tip, if you have a Gnomish Engineer they can make a teleporter that will port you right to Toshey's Station which is really handy. Literally took me about 2 minutes to check if this guy was up
-Kun-Lai Runt is also pretty common (or at least more "uncommon" than "rare"). Which is good because it hits like a truck and heals every turn making it one of the most annoying pets to capture. I lost two before finally getting one (one accidentally killed, second wiped out my whole group -_-).
-Eternal Strider was everywhere, I don't think this could be considered a rare. Which is probably good given how many people are in that zone all the time.
-I found a couple Harpy Younglings up. Maybe luck or maybe not as rare as the others.
-The rest I only found one up. Lofty Libram I had to camp a little bit (and there were a decent number of people also camping the area). I initially gave up but then came back later and managed to score one. I suspect that one is going to be the next Minfernal. Arcane Eye I also had to come back after no luck the first time, but managed to find one up.
I also ran MC and BWL, only managed to get Untamed Hatchling (still very satisfying to solo Razorgore though!