Sourdough starter to purchase?

I know I am a bit late to the party… most people seemed to take up making sourdough bread during lockdown… but I really quite fancy trying it now I have a bit more time in France… (I know, Coals to Newcastle etc’!!). I have been spectacularly unsuccessful at making a sourdough starter and I was wondering if I could actually buy one from somewhere or somebody… I am in the Sarlat/Bergerac area if anybody has a blob or two going spare to get me going… Many thanks… Jane