Literally just joined the forum for one reason: to beg for you to do Halloween III: Season of the Witch. Luckily there's a whole cavalcade of folks suggesting it. The reasons have been well listed already, but just for the sake of overkill: Tom Atkins fighting robots to prevent a master plan involving killing children, set to a great '80s synth soundtrack. Also, spontaneous snakes.
And: it is really easy to find. It just had a new BluRay release, it was previously on DVD from both Universal and, before that, Goodtimes, and literally any place that sells used DVDs is guaranteed to have it.