Being the good slime that he is, one can assume that Mr. Aziz would not wish to confiscate a burqa from one of the women in the crowd, thus forcing her to step outside in a state of uncovered-meat-ness. It also seems unlikely, albeit possible, that the mosque keeps a supply of extra burqas available. Therefore, it seems highly likely that Mr. Aziz keeps a burqa for his personal use whenever the need (or, ahem, desire) arises. Fortunately, he was just too butt-ugly for the scheme to work.