Buying Dark Will User Outfit?

[Sakutan]

I, stupidly, sold my Dark Will User outfit and now I realized I need it to open a Demon Door; I went online and found someone mentioning that in Knothole Glade you can buy it but they do not specify WHERE. Is this a hoax or can you really buy it?
I don't remember the trader I sold it to.
Is there a way to open The Bitter Shrine Demon Door with out this outfit?
Thanks!

 

[PSYCHOPAT]

In Darkwood Marshes there's a demon door " Darkwood Sanctum" it has the dark will users robes. And I'm pretty sure the arms trader as you enter Knothole Glade sells em. Maybe the trader in Twinblade's camp, not sure.

 

[Zarkes]

Dark armor and clothing are sold in evil areas so try looking in TwinBlade's camp. Knothole sells dark clothing try the arms dealer on the left right as you walk into Knothole he's next to the tattoo artist.

If you can't find any it should still be where you sold it last.