Just take a look at this beauty:
Courier Prime by Alan Dague-Greene
This is Courier Prime, designed for screenwriters — people who must format their manuscripts in 12-point Courier so their productions can estimate timing and length. Courier Prime is sharper, has proper bold and italic faces, and crisper printing and on-screen display.

Best of all, it’s free. And if you’re a font geek like me, you’ll enjoy the backstory on Courier Prime’s design.