ya, the adept 1 version drops, just like all the other spells. I'm not sure where exactly, if there is one area in particular. I got lucky and found the master on the broker for 2p.
Since the spell isn't all that great, because of the major penalties, and that the penalties no longer scale to the level of spell you have (app1, adept1, adept 3, master, etc), I would suggest getting an adept 3 or better, to even make it worth trying. Get a spongy loam and have an alchemist make one for ya.