ARCHIVE.ORG has been building a collection of old 78 recordings. You can find old recordings of Charlie Christina, Charlie Parker, Art Tatum, Mike Jackson, Duke, Dizzy, and the list goes on. I have this filtered by jazz but you may want to explore other options. Some of these are kinda fun to listen to. Give it a try

https://archive.org/details/georgeblood?and%5B%5D=subject%3A%22Jazz%22