So, I stumbled across a blog post entitled, "Ukulele Songbook MP3s are available in Files section" and instantly I was excited. After reading the article, it looks like folks from Ukulele Hall of Fame created the Fleabag Music songbook so that uke players, when we meet each other, can have a starting off point for playing together. Basically it's sheet music and mp3s for a bunch of public domain songs that are popular on the Ukulele. What's better, it's free!
The sheet music is really complete, but don't worry it also shows the fingerings for all the chords and you could just strum the chords. Anyway, for a free resource, it's incredible! Here are the direct links to the material (but I encourage you to check out the ukuleletonya.com blog as well):