2000 Buick Regal, 3.8 Supercharged. What other Body Style Buicks are interchangeable with the regal?

I need 2 sun Visors for my 2000 Buick Regal.

The Century was just about the same exact thing give or take some slight exterior variations and different engine.

Cars on the same platform at or near your model year were:

Buick Century
Chevrolet Impala
Chevrolet Monte Carlo
Oldsmobile Intrigue
Pontiac Grand Prix