looking for a solution / real world object analysis

May be the requirement might not be clear , here is the explanation in laymen [login to view URL] me know if you need more details. The customer comes to the shop with any metal object (nut/screw/bearing/gear/plates) that belongs to any vehicle ,for replacing [login to view URL] there is tough time finding to which part of the body the object belongs to or to which type of vehicle it belongs to ,it is a challenging one to find. So am looking for any automated solution to autoamtically point out where the object should fit in , so the shopkeeper can easily take [login to view URL] you have a cheapest and best idea ?