Android App Graphic Design

Our company Fantrail Inc has built an application for the iPhone and we are currently working on porting it to Andriod. The implementation of this is basically complete all the way down to having completed all the animation, and positioning images where we want them. The images we are using are not ideal though, and we would like to improve upon them. As such, we are looking for a designer preferably with experience designing for Android, although any mobile design experience is helpful.