Auto Krafters, Blue Oval Truck Parts, Carolina Classics, Dennis Carpenter, Mac's Antique Auto Parts, National Parts Depot, The Truck & Car Shop.
All have repro parts for your truck and catalogs that can be downloaded. Or you can call their 800 numbers and order their free paper parts catalogs.
Dennis Carpenter (800-476-9653 / 1957/66 truck catalog) is the largest reproducer, sells the best quality parts, while LMC is just the opposite.