TruckParts.org and Mill Supply Inc. are some of the places to find parts for a box truck. These websites focus on providing box truck parts from a number of manufacturers.
TruckParts.org provides parts ranging from diesel engines to transmissions for both medium and heavy trucks. A user can request a part by emailing the sales team of the website. Mill Supply Inc. provides the user with a page showing various box truck parts along with their specifications and pricing. The site also provides images of these parts, thus making it easier for a user to identify the right ones. The company also provides information on manufacturers of given parts.