Sustainability Bus Design Plans and Program Use

I am in search of detailed plans for designing a 'sustainability bus' that my nonprofit organization can take to schools and public events to showcase sustainability. I've been able to find pictures of the outside of buses on the internet, but nothing that shows how the inside has been designed. Any detailed design information that could be shared would be greatly appreciated. No point in reinventing the wheel (pun intended)! Also, information on how the project was funded and how it is used in the community would be welcomed.

Thanks,
Melissa Warner

Executive Director,
Sustainable Living Center
College Place, WA USA