Your probably not going to find a site the handles any body parts for any 50s Dodge trucks. Anything he will find will be a hit or miss deal. As they say, they ain't making this stuff anymore. With the Dodges, those words are fact, no one makes anything for them but a very few token pieces here and there. (Mechanical pieces are a different story, most things are available).
That said, the front fenders, hood & nose piece fit 1954 to 1956. 1/2 ton trucks have smaller wheel openings then 3/4 & 1 ton, and the bigger trucks have larger still wheel openings. 48-53 fenders, hood & nose piece might look similar but they are different. (I've owned and have had both the early and the late styles at the same time and the same place.) A 57 is a different critter but will bolt on as a unit, and 58 & newer are completely different again.
The sad part is most people can't tell the differences between the 48-53 and the 54-56, and the way some states titled trucks back then is no help. Many were titled to the date they were sold, not the date they were built. A 53 truck sold during the 54 model year may have been titled as a 54. Also through the years, Titles were attached to trucks they didn't belong to. I've seen 52 model trucks caring a 55 or 56 title.
If you post up a picture, I can tell you what style truck parts you need to locate. Some parts carried over for many years and are easier to find.
Sorry, not trying to discourage your friend, but this is what he is up against. Gene