I've scoured the internet and no other copy seems to be online, so getting in touch with Tim is probably your best bet.
A little background on the film
from --
https://www.denvernightingale.com/films.html
"MEET THE PIONEER MUSIC MAKERS
Filmed September 10, 1947; September 10, 1949; September 9, 1950; and April 28, 1974 by Lewis Brevoort Odell.
Products of Craft Works Progressive Art Laboratory. 1 reel.
This is not a commercial film, but a homemade, 8mm silent film, spliced together by collector Lewis Brevoort Odell, who filmed portions of the 1947, 1949, and 1950 John Bieling Day parties (reunions of early recording artists). It also includes footage from a 1974 party, held at the home of sculptor Jock Manton, in Sparta, New Jersey, to honor Edison's staff pianist, Ernest L. Stevens. The film has not been made commercially available, but copies have circulated on VHS among various collectors. The original 8mm film is currently owned by Dick Carty.
Artists filmed in order of appearance are John Bieling, Billy Murray, Irving Kaufman, Eugene C. Rose, Will Oakland, Walter Van Brunt, Harvey Hindermyer, Arthur Hall, Edna White, Elsie Baker, Charles Harrison, Fred Hager, John Young, Fred Van Eps, Grace Spencer, and Ernest L. Stevens.
Friends, family, and collectors filmed in order of appearance include John L. Norton, Jr., Jim Walsh, Quentin Riggs, Mrs. John Bieling, Jimmy Martindale (uncredited, but obviously present in 1947), Robert Rose, Elizabeth and Jim Van Demark, Ed Manning, Fred Bieling, Mrs. Lewis M. Wilson (daughter of Grace Spencer), Bill Hayes, Fred Rabenstein, and Joe Laurie, Jr."
If you haven't see it, this is worth a look --
https://www.youtube.com/watch?v=8k3UxDh-wDg