If you can do classical works - there are lots of good resources.
A couple of my favorites (and favorites of the teens I have directed)
are:
Rondo a la Turque (trio - transcription by David Jordon)
In The Hall of the Mountain King (configurable - transcription by
Michele Mason)
I also 2nd on "Pick A Winner" as all the youth I have directed have
loved this - even though it is secular, I still programmed it in
church :-)
And although you've probably heard it before, I have done some really
neat stuff with teens by simply taking something they like and working
it to suit them. A great example of this is that I have often taken
2-3 octave music and helped them figure out (if that's a learning
challenge you want to give them), or figured out for them, how to play
the piece with a smaller number of ringers.
In general, my experience is that youth ringers enjoy things that are
fast and have lots of techniques. If you can even find something that
they would otherwise consider "boring" but alter the tempo or the
techniques to still sound musical, this is another way to go.
-Josh