"Mes vêtements : une robe noire et un sac noir."
My guess is that in French speaking clothing stores, you will find purses, just like in English speaking clothing stores.
If I wanted to look for purses I don't know where else I would look for a large selection. Of course, there are brand name stores that sell a range of goods carrying their brand names and these include purses but any of the ones that I can think of also include clothing as part of their product line.
Same with belts, gloves etc.