The sprocket cover would fit, but would look like ****** IMO. The 68 line is for the classic because Triumph didn't really make a bike like the America, or Speedmaster back then. It's not like Triumph doesn't offer a ton of stuff for the America.
I have the lexan tank badges on my 05 Standard. I'm thinking about the black and gray seat, which would look great on my all black Bonnie.