I believe what you're requesting is the Concerto for Violin, Cello &
Piano, opus 56, with Oistrakh, Rostropovich, Kondrashin, & the Moscow
(Moscow, 5 Jan 1970) on EMI 491301 (LaserDisc and VHS)
The information was found at
under Sviatoslav Richter's Discography.
Upon going to http://www.emiclassics.com and querying the catalogue
number, I returned with this result which listed Brahms, not Bach.
Its available both in Laserdisc and VHS formats, but only for PAL.
Amazon does list an 'Archival Treasures' with David Oistrakh, but I
think thats the first volume.
Search query: ""Rostropovich" "Moscow Philharmonic" "Richter"
"Oistrakh" "Bach" "VHS""
I've done a bit of searching for a US version, unfortunately none seem
to be available. There are methods of watching PAL tapes on NTSC VHS
I hope this helps.