165/80 r13 ?

13 inch tires have pretty much gone the way of the DoDo bird. If you really need 13 inch WSW tires you will probably need to source them from a place like Coker Tire online. You may find a tire shop that still has some old stock on hand but that would be by pure luck and checking with every independent tire shop you can find. I found some for my old Valiant that way but had to check with almost every tire shop in Wyoming and the eastern half of Montana.
If someone has something on hand they will probably be 185/80R13. Make sure they don't try to sell you trailer tires as the 185/80R13 is still a common trailer size.