The Parmacotto brand of mort is my favorite available in the US. Most good delis here have it.
As for sopressata, my favorite just about anywhere is Riviera's hot. I picked up a few in Manhattan, which were very nice, but not quite up to the Riv's (I know, Rabbi, there are better places to buy supersod in NYC).
Bari has a serviceable dry sopressata from "St. Louis" (all I could get from the owner). If it's from Volpi, it is better than what is more widely available in groceries.
Not sure if Molinari, from SF, makes one. If they do, I would expect for it to be excellent.