Where may I find The Force on Thunder Mountain?

[OhMyGoooood!]

My dad rented this movie for me to watch almost 20 years ago. It gave me terrible nightmares and has haunted me ever since. I need to watch it again. Does anyone know where I may obtain a DVD or digital copy? I only saw the VHS available on Amazon. Hopefully I may gain some closure with your help.

Thanks so much friends.
Evan