ther'es a crappy ny winery called TAYLOR PORT but probably would never get confused with the Taylor Fladgate vintage ports.
There are also different bottlers for port. where people will get together buy a barrel and bottle their own. Wine Society comes to mind as their own bottler of port. Mayor and Sworder is another.
Also alot of older ports are relabeled, ever wonder why a 1963 vintage port looks so nice and clean? Probably relabeled.