Sensi Seeds have a couple of authentic Skunk strains, it was Neville Schoenmakers who brought this plant to the World, courtesy of Sam the Skunkman and Sensi bought all of Nevilles strains to start their seedbank, so they would have what I would classify as the closest to the real and original Skunk ever made available to the general public. Also, their Shiva Skunk is pretty awesome and stinky too and is what they say is their most potent Skunk type plant and is a cross of Skunk#1 and Northern Lights#5, but be warned, you will need EXTREMELY good carbon filters to grow this plant, unless you live at least a mile from your closest neighbour!
Hope this helps,..........
Organoman.