I remember this as part of the late night AIP remakes (which you mentioned in your review). This is the one I liked second best. How to make a Monster was the best one-I thought did a good job at updating the ideas of the original.
I'll have to look into that. The only ones I ever see available are SHE CREATURE, EARTH VERSUS THE SPIDER and TEENAGE CAVEMAN. And TC and EvtS are both, by every account I've seen, horrible.