Death of Petticoats?

I am having the hardest time finding a local supplier for Petticoats. I am hearing a lot of people who used to sell or make them have closed from dress suppliers. I guess people no longer wear them, except for weddings. My mother-in-law mentioned when she was growing up they were very popular. Of course pants were not allowed in schools for girls until she went to college, so everyone was wearing skirts and dresses. Petticoats give such a wonderful fluffy look to dresses!