Exactly right - when you visit PartsTech for the first time, we show you a random parts source, and a tab called "PartsTech Catalog". You'll need to select your preferred distributors and - where applicable - enter your wholesale account information so we can show you your specific pricing for that vendor. After you set your preferred distributors, you will always see them first when you search. If you have any questions on that process, feel free to shoot me an email (estpierre(at)partstech.com)
The "PartsTech Catalog" tab can be used when your preferred distributors don't have the part you're looking for in stock. We can help you understand who has the part - whether it's in town or across the country.
Again, the system is brand new. We're trying to define a system that saves you time - so let us know what we can do to make it better.
Erik St. Pierre