I don't know of it's okay to make this suggestion but many of these movies are available for download in common places. I personally have no qualms downloading movies from the 30s and 40s. It gets grayer for me in as the age gets younger.

To give a HN safe-ish link, here's entry #11, The Thin Man (1934) on the archive

https://archive.org/details/the-thin-man-william-powell-myrn...

If that's not a good encoding you can easily find other sources.

If that's against your policies, many of these are available on Amazon