What size of MySky Wind deflector is best?

Just bought my Latitude with MySky sunroof and want to get a wind deflector so I can have it open more often without the thumping. Measured the sunroof and it is around 36 inches wide. Has anyone purchased a wind deflector? If you have one, how wide does it need to be to avoid blocking the sunroof mechanism?
What brand is it? Where did you find it? approximate cost?

Also, what colors looks the best? Black, Smoke, or ligter. My Renedage is Solar Yellow, so I am thinking darker is probably better.

Thanks!