Here's an eye opener from a simple Google search:

Here's an eye opener from a simple Google search:
(chinese air cooled diesel engine)...

https://www.google.com/?gws_rd=ssl#q=chinese+...sel+engine

This will give you a broad view of how large the small, air cooled, diesel engine market is in China. You can buy them through various online sites.

One of the manufacturers is Fuzhou Hailin Power but George could be working with any one or more of these manufacturers.

Many of these engines are sold throughout Southeast Asia, Africa, Mid East, Eastern Asia.