Where can I Buy Plaster of Paris
You can buy plaster from most craft supply stores, department stores with a craft section, or home and building supply stores. There are also stores that sell plaster online. You can find more information here: http://www.allcraftsupplies.com/
Most any hardware store carries it. Or you can purchase it at Walmart. If you need a large amount of it. It is best to purchase it at a hobby shop or a craft store.
I was searching on internet for several days and found quite a few cool websites but at the end of the day I still think the best choice is there: http://tinyurl.com/crpgdbf