A suit is a suit. The pants can go with a different coat or blazer, but the suit coat would look weird as a stand-in for a blazer. _
You can cycle through the 9 or 10, getting many more styles by mixing these up, yet still staying in formal business attire. It just staying with the same shoe color as the pants. Also, a two tone dress shoe for the same will make it more business like, yet not so strict. Especially PR business.
sure- check the suit separates in the mall anchor stores such as JC penny, Macy's etc. They allow you to buy the jackets and pants and vests as individual items - you can then also check what colors will work together - black/grey/blue/navy etc.