This app was mentioned in 4 comments, with an average of 1.25 upvotes
I've been using this, it has a "scenes" pack you can purchase in app that might be sort of like what you want: https://play.google.com/store/apps/details?id=com.cogsciapps.mysleepbutton
They want $2.99 for each of the packs, but it works fairly well for me and it's gotten some good reviews from people I trust. I've only tried the "simple things" and "drawing objects" sound packs.
Here's the review that turned me on to it: http://kk.org/cooltools/my-sleep-button/
Guided sleep meditation, or this app: https://play.google.com/store/apps/details?id=com.cogsciapps.mysleepbutton
The concept behind it is that it "shuffles" your thoughts. It says a random words every few seconds (configurable), which you are supposed to free associate your thoughts around. Even if one word ends up somewhere unpleasant, the next will help you wipe it out. You may find your mind wanders away from listening to it, but that's not a problem. When you notice, listen again. It really works wonders for my busy mind! Now to remember to use it every night...
My Sleep Button is amazing! I always am asleep within the 20min period, even if I do laugh at a few of the thought topics. It's free for iPhone, but a few bucks (and worth it) for Android.
Try to count down from 300 or an app like mySleepButton. Basically the principles are the same, disassociate your thoughts, simple ways to avoid that you start to construct complex thoughts that keep you awake.