[68 c10 ls2]

Where is the best place to buy new doors from? I don't want to pay $1000 for a NOS shell but i also don't want to pay $100 for a shell that doesn't fit worth a crap. I have to buy 4 doors for my orginal 68 crew cab so i dont want to spend 3 days on each door trying to get it to fit. Thanks for your help. Please leave the name of the place to buy, price and possable web site link. THANKS