As one left handed shooter to another
10m Match rifles from Walther came with ambi stocks as well as dedicated right hand stocks. The models were LG90 and LGM-1.
Dedicated left hand stocks and actions were available for the LGM-2 and LGM210.
FWB made the 603 Junior with ambi stock
Steyr LG1 was available with left hand stock.
Diana 100 was made with left hand stock.
There are a few examples circulating out there, try a 'Wanted' ad on here and you may prise one out. I think you need to get a few more posts on the forum before you can access the 'Sales' section.
Good luck