Martin Model & Pattern company, of Scappoose, Oregon, manufactures
flywheels of cast iron and cast aluminum in several sizes, from 3" to
16" diameter, primarily for model engines.  One 4-1/2-inch flywheel
includes a counterweight which would look nice with a handle screwed
into a boss on the opposite rim.  Visit

  http://www.martinmodel.com/index.html 
  http://www.martinmodel.com/MMPflywheelslist.html 

An article in Farm Show Magazine about proprietor Gary Martin is
reproduced at https://www.farmshow.com/a_article.php?aid=24606 

Robbie Rhodes - MMDigest