Thanks. I have never heard of the Lionsgate box set.
As for 20th Century-Fox 35mm I have a couple of stories from my city, Melbourne. Firstly there was a company called BB or something similar, Chemicals in the inner Melbourne suburb of Collingwood. Some companies sent prints there for melting down for the silver etc. Fox was one. I know of guys who said that there were usually several prints of the same film that went there so this guy got this reel form that print of Film X and that guy got Reel so & so from that copy and so until between them they had a complete film. Many of these were Technicolor musicals from the 1940s.
I was told of one fire of these musicals in a suburb in my municipality about 5-10mins drive from my home, a suburb that was mostly scrub and near the sea then and suffered from the 1939 bushfires. Who knows.
Then is an inner suburb there was a guy I later knew as a customer who worked for the City of Melbourne in the gardens but was mentally effected. His lived with his Mum in this house adjoining a home appliance factory. I was told his Fox musicals set the house on fire and he just stood there just staring at the residue.
Later I heard about a court case regarding films from this chemical works. Someone got caught and reported the other names in the ring who had prints so he would not be carrying the can by himself. I know one man who involved whose parents once had a bakery shop a block up from my shop before I was in business. The family loved films. The dad got scared and burnt the films in the back garden incinerator(I wonder due to what would happen if that method was used). According to this man they also burnt a mid-30s Canadian Western. He showed me a Classic Film Collector where they were looking for this "lost" Western. He swore blind they burnt a good copy. They still went to court and got fined, I think, and a bond.
It was said they did not know what happened to MGM's films for destruction as they never came thru that chemically works. MGM also had sound on disc in the depression in Australia, as did Universal. A workmate, an old man then about 1968-70, had a boyhood friend whose family owned a moviehouse and they often went with the dad on Saturday mornings to MGM's Melbourne warehouse to collect the week's films and told me about the discs for the sound.
Later the likes of Fox used to send films to the city dump and had a lawyer go there and observe the workers put an axe thru the reels and signed off the operation when it was finished. Columbia cleared out there excess material including those Columbia 3-D shorts for destruction. An independent distributor, Filmways(not the US company involved with The Beverly Hillbillies), destroyed all their excess prints in the 1970s. Filmways was owned by a moviehouse group that had a few houses in Melbourne. In the 1980s I got a few Variety newspapers from the owner's household trash can when I used to do advertising catalogs in the area. He had an upstairs little screening room in the house, not uncommon in properties in that wealthy suburb.
In the 1970s someone(a farmer, actually) knew someone who worked in telecine in Sydney at the TV station running Fox's pre-1950 films. Copies were made from the 16mm films and the unprocessed film sent to Melbourne to the sister station who had a film lab on site but operated by an outside business to process the newsfilm etc. The titles included Clive of India, Suez, Shirley titles and so on. None of the pre-1935 Fox titles were in the package.