Southern California photographer Barry Colla began releasing 12-card single player card sets in 1990. His 1991 releases included Ryne Sandberg and I've got his twelve cards today.
There were 15,000 of the Sandberg sets made and they can be found today for a pretty reasonable price. I think I paid about five bucks for mine.
It's nice that all the pictures were taken at the Friendly Confines. It looks like the 10th and 11th cards have pictures from the Home Run Derby at the 1990 All-Star game at Wrigley Field. Sandberg is batting but not wearing a helmet. There are also a bunch of players in American League uniforms sitting along the wall.
Sandberg actually won the derby that year, so yeah Ryno!