Excuse me if I sound immensely naive, but I know absolutely zilch about jewelry.
I have an absolutely beautiful, simple 3-stone princess cut diamond ring. It is everything I wanted, but now I need a band to fit with it! It slightly curves in toward the stones, making it hard to find a matching band. If the band didn't fit snugly against it, I'm pretty sure the perfectionist in me would go mad. Have any of you had this issue with your engagement rings (if bought separately from the band, obviously) or know where I could find a nice band to fit?
This is a picture of my ring; hopefully you can see the curve I'm referring to.

Thanks!
Edit: I apologize for the HTML coded mess; the picture of my e-ring is now up!