Learn English – another phrase for one stop shop

Haberdasher is what you are looking for.

From Chambers,

"A seller of small sewing articles, such as ribbons, tape, etc"

"A men's outfitter (N American)"

If you don't use this phrase, you may not know that it carries some precision. If I say that after I do X, I think I will have time to go shopping, you don't know if I just intend to randomly browse, get birthday presents, or buy the weekly groceries. If I say I think I will have time to shop, then the random browsing is excluded (among the people I talk to) by that phrasing. And if I say I have time to do a shop, it's marked as a sort of to-do list item of regular occurence, meaning the weekly "grocery shop" that has to be done at a regular rhythm. The reason we have three ways of saying the same thing is because they aren't precisely the same thing.