The OAC Evangelism Flip Chart is a great tool Open Air Campaigners has been working on developing, along with our friends at Tract Planet. It is a set of vinyl banners you can use to start and walk through a Gospel presentation. I have been using a prototype of it regularly on the streets for a couple years. It very easy to learn and teach, and very effective.
The link below shows where you can purchase the OAC Flip Chart at the link below.
Purchase Flip Chart
The videos below show assembly, and how to use the Flip Chart.
Feel free to reach out to me if you have any questions.