You can try some popular streaming platforms like Netflix or Amazon Prime Video. They might have it available for streaming.
You could look on specialty horror movie streaming sites. But be careful, some might not be legal or have good quality. Another option is to check your local cable TV's on-demand section. They might have it listed there.
Well, there are several options. Sometimes, you can find it on Hulu or HBO Max. Also, check if it's available for rent or purchase on Google Play Movies or iTunes.