My brother had a ton of that eras magazines, and even though primarily shot on 8 mm a majority were also put on cassette vhs for resale. As for Su Ling I am almost positive she was contracted to Curtis DuPont films which became triumph or other way around. But either way it’s nearly impossible to locate their stuff anymore. The original DuPont studios vanished after late 1980’s . Among their list of fighters were Kelli Stewart , Candy Samples, Hanna Vieck, and RoseMary Lorenz . I think all but Candy are still alive and Kelli was big on Napali videos till they lost fan base for shooting the same looping scenes and charging people for an hour long dvd but after taking out the loops you really got a 30 minute or less dvd .