Voyager Golden Record 2-hour raw audio

I am trying to obtain the 2-hour raw audio resulting from playing both
sides of the 1977 Voyager Golden Record on a 16 2/3 rpm turntable with
a cartridge like the one included on the spacecraft. I want to
analyze and decode it like a discovering alien would have to. I have
contacted NASA, JPL, and the Smithsonian, but am having no luck with
them so far.

(I am not interested in copies of the photos and audio that were put
on the record or other common information available on websites, the
"Murmurs of Earth" book by Carl Sagan, or the 1992 "Murmurs of Earth"
CD-ROM by Warner New Media.)

Any help would be greatly appreciated.