[panarky]

"Joe's Truck Parts dot com" is probably not the best example of navigation or search. http://www.joestruckparts.com/

But you might be surprised to know that many sites for automotive parts are actually operated by the same company. They have different domains, UI skins and marketing campaigns, but they're the same under the hood (so to speak).

For example, compare https://www.carparts.com/ and https://www.usautoparts.net/