are you talking about as a technician? You can try EBay and such for that kind of stuff. I used to be a printer and computer tech before I got moved to my current sales position, so I may be incorrect about one or two items.
Make sure you get *grounding strap*, philips #1 and #2 drivers, pliars (for jumpers), flat-blade driver (sometimes easy to unclip plastic), and a set of eyeglass screwdrivers would be handy too (for working on notebooks). torx t10 and t15 screws are good for taking off processors (some). Other good things to have would be diagnostic software, isopropyl alcohol or simple green + scrubby pads and surface cleaner (Windex, or my preferred ProForce, which has no ammonia) for cleaning the product before returning it to the customer. and the obvious things like duster, thermal grease, etc
