I have a few obsolete parts in several lines.  Not a lot but might be just what you are looking for.

Briggs & Stratton- rings, rods, pistons

Tecumseh- rings, rods, not much in ignition

Kohler -some stuff for K series

Murray

Smaller Husqvarna and Jonsered saws

Some old Green Machine heads

1-800-259-1414 or 405-258-1265