From what I can tell from the overly complicated chart, top blade roast or steak if cut from the chuck primal, above the shoulder blade.
Brisket is brisket, I have never seen it under another name. I would suggest you try Kosher or Halal butcher shops, as brisket is a very traditional dish in Jewish culture.
A large chuck roast would do. The meat of a top blade is a little different than other parts of the chuck, but, it is the same basic priciple of hard worked meat, lots of connective tissue, long cooking etc...