Frame for a 46'?

[SJBlazer]

Hello all very new to the site, im a 1971 blazer guy but my dad has a 1946 chevy pickup and the frame is rotted apart. So we are in search of a new one desperately. Heres the story to the truck. In 1946 my great grandfather bought the truck brand new, and its been in the family since the truck has never been sold and has alway been kept around the farm. In the 70's when my dad was a teenager he ran the truck around the farm eventually the clutch went bad and instead of fixing it was parked in the woods. And it wasnt until about a month ago now me nd him drug the old truck out of the woods because he now realizes that the truck should be restored so now we need a frame. any help would be great! thanks