In reality, they are not new almost anywhere. They appear at a carcass approx 5 days after death. There are a large variety of Dermestidae. Some of the are not even considered flesh eaters.
So, thew only areas that they may exist would be in areas where the temperature is constantly below 30 degrees Centigrade.
Moisture/mildew is very harmful to a colony. Be careful try to dry all items before putting it into their enclosure. They should live quite well in newspaper clippings. You should try and mist them with water every day or every other day. You will see them come from under the paper to take moisture off of the paper.