Do you mind if I post your question to a few film communities I belong to? Perhaps widening the search could yield some results...

*edit*
There's one group I belong to, where I've posted partially-remembered films that I watched 30 years ago and asked anyone if they might be able to identify what I was thinking of, and they were able to get both of them pretty quickly. This is a different kind of question, of course, but I'd like to put them to the test!