Instead of looking for a brighter display at great expense, the most practical solution to your problem is simply an RC 2 screen shade, or flying from underneath shade, such as a large umbrella, or even a dorky, but mobile and efficient $6...
Well, this is too late to help but if you had gotten there fast enough, there's an app in the controller to make the drone flash and emit a tone.
That's how I found mine.
Of course mine didn't have a dead battery but you probably had enough...