That’s right, sandals with socks…a ‘must have’
They aren’t so easy to get. They drop from 1 kind of trash mob; Death Talon Wyrmguard in Blackwing Lair. There are 2 groups of 3 Death Talon Wyrmguard. There is a simple technique you can use to farm these. Only kill 2 of the 3 mobs in the pack and drop out of combat (if you can.) The 2 missing re-spawn immediately.
This was suggested by a player in Wowhead and it worked well for me as a priest, I used ‘Spectral Guise’ and I was able to drop out of combat. More information available HERE. [Link to Wowhead comments]
Another model is also available in a different color (blue):