Curse of the Black Widow (1977)

Do you remember this movie from the 70's (1977)? It is about a woman who was bitten by many spiders as a youth, who can transform into a giant black spider. To this day, in my opinion, this movie is much better than a lot of the crap that Hollywood has recently manufactured.

Also, could tell me, or direct me to, where I could find the original T.V poster ad for this film? I remember that it was a picture of a spider with 8 human female legs, a spider's abdomen, and a human female face attached to it's body. The ad appeared in T.V. Guide.

This would be an awesome collectors item if I could find it.

Let me know.

Thanks