Argon 18 provides a wealth of information on their website for mechanics and end-users alike. You have to scroll all the way down to the bottom right corner and click on downloads. There you will find assembly guides, fitting guides and spec sheets, all organized by year. I find the cockpit diagrams and torque specifications in the assembly guides for the triathlon and tt bikes especially helpful. Toward the end of each assembly guide you will find a map of the part numbers for each small part that is available to order through an Argon 18 retailer.