Where would I find a copy of a movie entitled "The Working Girls" starring Cassandra Peterson?

Question

I think she was in old monster movies

Answer 1

I found the movie you're after for sale at Movie Unlimited.
Have a look at the link below:

http://www.moviesunlimited.com/musite/findresults_actor.asp?search=Cassandra+Peterson

They sell it for $19.99 on DVD and for $24.99 on VHS.

Hope this is what you were after.

Answer 2

Cassandra Peterson is Elvira, mistress of the dark.