Where can you buy a disconnector assembly including the spring for a JC Higgins Model 28 583.71?

You can purchase a disconnector assembly, including the spring for a JC Higgins Model 28 583.71, from various sources such as online firearm parts retailers, auction sites like GunBroker, or specialized gun parts suppliers like Numrich Gun Parts. Additionally, checking with local gun shops or gunsmiths may yield results, as they can often order specific parts. Ensure that the parts you buy are compatible with your model to ensure proper functionality.