I am looking to have my computer shipped across the country from Cali to NY but I am having trouble finding a box to ship it with, where do I look to find it? I have seen them on sites like office depot or staples but they only sell in quantity. This is the case I have, http://www.newegg.com/Product/Product.aspx?Item=N82E16811119227 and the dimensions are 19.30" x 7.50" x 16.70". I am going to use FedEX as they seem the cheapest and somewhat reliable, is this wise? Also what precautions or other thing should I be thinking of? Any help is appreciated! Thank you!