High Times did a study years ago with some DNA testing of various strains of Durban Poison. They concluded that Dutch Passion seed was the closest to the original.
I think Grow Weed Easy has strains by region. I ordered Ace Seeds hybrids that do well in humid conditions. They have them rated as to what latitude it can be grown and how resistant it is. Panama, African and other countries of origin. Most are 11 to 14 week flower but some are earlier.