Setting is in the Hrakert Rift below Manaan from KOTOR.
(This may be incredibly hard since we know nothing about Dustil's TK and Saber feats, BUT, we do know for a fact that he was at the very least a Jedi, he had tapped into the force on Korriban so the Logical explanation was for him to become a Jedi when he was turned, right? My guess, anyway)
If only Dustil had a cutscene where he fought a few guys on the Telos Restoration station in TSL, then we'd have SOMETHING, but alas, I can't argue that you are right here.