Used Vending is one site to find used food trucks for sale. If your friend wants a custom food truck, Prestige Food Trucks is a website which offers that option.

Food Cart USA manufactures food trucks that can be customized to your needs. You can also purchase a pre-owned vending trucks from Used Vending. They have a variety of trucks available.

There are a wide variety of trucks and trailers designed specifically for mobile food sales. You can buy used trucks, new trucks, or have a truck custom-made to your specifications. To get an idea of the kind of options available, take a look at the website at: http://www.concessiontrailerswarehouse.com/

The Corpus Callosum. You can go to Neuroscience for Kids to find answers like that.

*Actually, the Corpus Callosum is the structure, but the type of tract is commisural.

You can find list of food trucks in LA on the following websites; yelp, Find LA Food Trucks, Ranker, Food Trucks Map, and Los Angeles Travel on About website.