1984 is a singular year for Trek decals- It’s the only year they did the decals like that.

Are you going for the full-on period correct thing? If not... My personal opinion is that the 1986/87 Trek Downtube decals were the best looking- Since the “Trek” and “USA” logo/lettering on the decal is the same through 84-87 and the gold-white-black color scheme would look cool on pretty much any color bike... and it does pop more than the monochrome 84/85 graphics.

At that point- if you wanted to add the square T “Waterloo” seat cluster decal, the white block back of the seat tube decals, or the “700 series” TT dcecals- you’d have a custom set- squarely mid 80s style, but 1984 heavy.