You should be able easily find all the materials to build this simple engine.
Only simple tools are needed, not even a drill.
This engine is developed from my EZ Stirling    • Easy to Build Stirling Cycle Engine. ...   in response from builders who have been unable to get the specified tin or balsawood in the the part of the world where they live.
I hope Pringles are available worldwide!
Visit http://myfordboy.blogspot.co.uk/ to get your free plan.