The 1969 design should be simple to duplicate. All you need is the team name, a colored circle for the name and position, and a picture.
I've gone over all of this before....the team font is close, though the black outline on the originals is thicker. The names inside the circle are close, but not the right size. The position designations are off.
Let's worry more about how the two teams compare...
As beloved as the '69 team is, I think to only player on that team I'd take over the '18 group is BIlly Williams. Ernie was at the end of his career and in decline, Santo and Bryant are close, as are Heyward (better glove) and Hickman (better bat).
The '69 rotation was just three deep and then a prayer (Selma, Nye?). The '18 staff has these three plus Darvish and Tyler Chatwood.
The '69 Cubs won 92 games and were a huge disappointment. The 2018 Cubs should be able to win at least that many and have the ability to bring the same joy as the '16 team.