Questing Crafter's Guild while watching PDF.
This information is very wonderful.

But there is a problem.
The listed merchant does not sell the correct item.
Graktak in Grobb does not have a Corking Device,
Darius Gandril in PoK does not sell Celestial Solvent.
This is a serious matter!

Who else is selling these?
I checked Abysmal Sea merchants, but no one sold them.
 

Sorry for poor English.