No, it's not real, and you won't find it that way.
In dod, the value is inside pev_iuser3. If he's proned (laying), it's 1 - if not, it's 0.
You can try searching the forums for ts laying or ts prone or ts stocks to find if anyone has already made something to solve this. If the stock doesn't exist, you can figure out which pev value it is by using FakeMeta Tools (in the plugins forum) and test each of the iuser and fuser values. Shouldn't be too hard.