If you are in Versailles there is Vart Électronique. I once needed a cable or something and thought I would need to order it on AliExpress. I gave them a call

If you are in Versailles there is Vart Électronique. I once needed a cable or something and thought I would need to order it on AliExpress. I gave them a call and 15 min of biking later I had what I needed for a few euros. The shop is an inscriptible mess but the guys running it are ok.