I found some of these on Old School Mini Bikes today .
Here's the link ....http://oldschoolminibike.mybigcommerce.com/nos-tecumseh-muffler-for-skat-kitty-rupp-speedway-more/
Here's the link ....http://oldschoolminibike.mybigcommerce.com/nos-tecumseh-muffler-for-skat-kitty-rupp-speedway-more/