That is a good page!
Vienamese, North Korean, East German are pretty rare.
In Canada, Albanian and Romanian are rare, but could be imported from the US if one so chose to spend the money. Egyptian contract rifles are in the same boat as these, as are Russian made but DDR marked versions (East German but from Russian lend/lease).
Bangladesh has Chinese SKS rifles, but may also have made their own with Chinese help. They did this with the Type 81 rifle but may have done it with the SKS first. Not yet confirmed.
Then you get the Yugos, Russians and Chinese. Pre 49 Russians would be a find. I passed a heavy refurb up locally before I understood much about SKS carbines. The recoild spring cover had a hand carved tula star and "CKC-45 1948" hand carved below it. Still kick myself. Should have grabbed it for the cover alone.
Many other countries used them. Any with marking from another country other than the home country of manufacture would be very interesting.