Do you have recommendations for shops that sell better representations?
I have always made my own reenactment clothing, so I haven't been in the market. I hope someone else can help with your question.
If you are looking for reproductions that represent ready-made clothes, I would expect the main difference from "custom" work to be a less perfect fit.
Surviving original clothing is rarely labelled, so it's hard to say whether a particular piece was ready-made or custom made.