Find out if a film is on iTunes, Amazon Prime, Netflix or Now TV

Searching for John Savage

Is Alien Rising available on iTunes, Amazon Prime, Netflix or Now TV?
Is Bermuda Tentacles available on iTunes, Amazon Prime, Netflix or Now TV?
Is Hair available on iTunes, Amazon Prime, Netflix or Now TV?
Is Little Boy Blue available on iTunes, Amazon Prime, Netflix or Now TV?
Is Message in a Bottle available on iTunes, Amazon Prime, Netflix or Now TV?
Is Salvador available on iTunes, Amazon Prime, Netflix or Now TV?
Is The Deer Hunter available on iTunes, Amazon Prime, Netflix or Now TV?