Excited to share! I have dug up what could possibly be the "US" version of the British 1988 Economist. I give you OMNI magazine, June 1991.
The cover is titled "The future of Money: One World - One Economy." Now dated 28 years, the article is quite amazing discussing the theory of a future one world currency. Furthermore, another interesting highlight is the piece goes on to discuss the status of the British '88 Economist article. Cover art is quite amazing also.
If you see any of these magazines out there, you should scoop them up right away. As Omni magazine went out of business in 1997 (printed versions stopped in 1995), these will be very difficult to source and should be highly collectible once word spreads.
Happy hunting!
Pics:
https://imgur.com/a/SVJCHLf