On the Gamebanshee item database there are a bunch of yellow set items (Armament of the Gaul/Germania, Garb of the Great Merchant) - these items aren't listed in most of item lists. Are they in some sort of patch or easter egg? Or are they in standard TQIT but easy to miss 'cos they're yellow?
I believe they were optional items that could only be accessed via a special code which you could put into the "Unlock Content" option on the ESC menu. These codes are now easily found using the magical search function.