Porter is the tomato that my wife and I first fell in love with
It does have that old fashion taste. As OzoneNY wrote - don't overwater it. As for where to get seeds - My Porter seeds come from transplants bought back in 2014. I save seeds from them each year. What I have is just plain "Porter". Not CH Strain, Improved, Select, Porter's Pride, etc.
If you would like some Porter seeds, PM me your mailing info and I'll send you some. No SASE needed.