i had this problem to !! i only the sold the gauntlets though. and i sold them to the redgaurd woman, and it was many days after so there was no chance she had them anyway, but, im not sure if they fixed this patch or not because it worked for me. (side note: you NEED the armor to upgrade, or else you cannot become guild master, and the quest in incompletable apperently) BUT, i had everything with me other than the gauntlets, yet she still gave me the full master guild armor set. so i wouldnt worry. also to get the armor before the master guild set, you only need one piece of armor to upgrade and youll be fine. but it worked for me even though i was missing the gauntlets for the master set