First and foremost get our pocket book out. It will cost lots of $$ if you want to do it right. Second, chances are you will never find all the "original" parts. You may come close with enough money, but probably will never get all the way there unless the car is virtually unmolested to begin with. A good donor car will be the best bet. You can take parts of and have them refurbished easier sometimes than trying to find them. Ehay is a decent place to find parts if you know exactly what you are looking for and can spot a fraud easily. There are lots of places to buy parts even NOS (new old stock) but it will not be as good as the "original" in most cases. NPD (National Prts Depot), Mustangs Plus, Ponderosa Mustang, The Mustang Ranch, Mustangs Unlimited, Virginia Mustang, Dallas Mustang and on and on. Others will have other ideas.