Whoa, sounds pretty interesting - Google results are mostly modern films - but IMDB did have this LIST (imdb link) hopefully it helps. And this particular list for "EVIL TWINS" films : IMDB Evil Twins Films List

As for recent Twin/Sibling ghoulish shows - there's Goodnight Mommy, A Tale of Two Sisters (this was good),

Let me know if you managed to find the title of the film