I know...i ask a lot of questions... but I looked all over the explore map and cant find it

The items which can be used to make the different combinations are found in Philosopher's Stone. To make the combinations, you have to go see the Alchemist. NOTE: You have to be a zombie in order to access the Alchemist.

Manual directions: Both places are in the Underground, which is in Shadowglen (click on the tree on the far right, with the red x). Once you're in, click on the first tunnel (on the far left). That'll take you to the Underground Commerce, where both the Philosopher's Stone and the Alchemist are located.

That explains why I wasnt finding it, cuz Im a human. felt like a total derp for not knowing lol. Thanks!