My friend Frank Coyne has sent me a link to the Boston Public Library online 78rpm collection (includes cylinder recordings too).
Check it out here: https://archive.org/details/78rpm_bostonpubliclibrary
A quick search for Vess Ossman yielded 74 recordings and Fred Van Eps 83 WOW
This is an excellent archive and the audio tracks are downloadable too :-)
One I had not heard:
PRETTY LITTLE QUEEN by Vess Ossman
Classic Banjo Style playing from THE masters! Enjoy, and thanks to Frank