Where can you purchase a shell for a pickup truck? Their big, bulky, and it doesn't seem like their are a lot of pickup shell dealers lining the streets.
You have several options however, and its easier than you think to purchase a shell for your pickup. First, decide if you want to buy new or used.
If you want to buy used, your best choice is to watch the local classifieds, Craigslist, or eBay. You can also go to used car dealerships, auto body shops, and Truck Accessory Shops. Their are many auto shops that work specifically on trucks and can lead you in the right direction, or even special order for you.
For a new shell, your best bet is to go to the car dealership that is the brand of truck you have. So if you have a Chevy go to your local Chevy dealership and they can hook you up.
Online the choices are even slimmer, but you can try eBay or buying direct from the manufacturer.