I just found this forum. Great stuff!
There are two Region 1 dvd's not yet mentioned: TALES OF EROTICA (Trimark) - I believe it's OOP and my copy originally came in a box-set with some other Trimark titles called "After Dark Collection".
Then there's his segment for "WOMEN & MEN: Stories of Seduction" on HBO DVD.
My favorite film of all-time is THE MUSIC LOVERS. I have a DVD-R that I made off my old widescreen laserdisc (thank God for that release!!!), but I'd really like a more proper presentation. I rarely watch movies more than once, but my DVD-R of THE MUSIC LOVERS gets played more times than I can speak of. I also love many of Russell's other films, such as TOMMY, THE DEVILS, SAVAGE MESSIAH, THE RAINBOW, and others. Even in his lesser films, there's always something to enjoy. I have all of his Region 1 releases (I bought SALOME'S for $60 about 6 years ago and thought that was high - now it's a bargain!).
Warners could easily do a box-set as they have 5 films: ALTERED STATES (already out), THE DEVILS, SAVAGE MESSIAH, LISZTOMANIA, and THE BOY FRIEND. ("The Boy Friend" wasn't a UA production - as far as I know - so now it would be with WB instead of MGM, just like "Savage Messiah" via the Turner purchase and sell-off.)
MGM still has THE MUSIC LOVERS and VALENTINO as they were UA films and MGM retained that library. Fox now distributes for MGM (no longer Sony), but their releases of catalog titles is practically nothing so these films will continue to languish in the vaults. Un-fricken believable. When you see all the crap movies MGM and Warners have put out on DVD over the years and these great movies are ignored makes me seriously ill.
I have also contacted Criterion a few times. I think they'd have a better chance with MGM than Warners, but who knows? I wrote a letter to a US video magazine called VIDEO TIMES in 1984 for a column called "Why don't they release?" and my request was printed. This was back in the VHS days, of course, but THE MUSIC LOVERS wasn't out yet even on VHS and that's the movie I asked for. It did finally come out on VHS and thankfully that laserdisc, but both of those were short-lived and now it's 25 years later. And the film has basically been completely unavailable for most of those years. Depressing, to say the least.