Welcome to Roadfood!
Unfortunately, I think you're dreaming the Impossible Dream.
A lot of us on here have commented, "Things don't taste like they used to!" on all kinds of products.
I lot has changed in our taste buds over the years too!
Our taste buds aren't as sharp as they used to be.
The Way cattle are fed and the way meat processing has changed, cooking equipment has changed etc. makes it impossible to duplicate products from 40 years ago.
The chances of duplicating a product, especially meat, is slim to none.