How do I repair my screen? [Respond asap]

My MP3 player dropped out of my pocket onto the road while I was leaving my car. Unfortunately, I didnt realize it had fallen out of my pocket until the next day where it rained. I found it today just now and unfortunately the entire screen is cracked, and I can see a little water droplets inside the chassis. Fortunately, however, my MP3 still works and files are accessible through my computer. How can I repair my MP3 display? Is there any good reputable replacement part sites so that I can purchase and repair my own mp3? If not, where can I send my Mp3 for repair? Thank you all in advance.