The closest to a 52 frame will be a 48-51 frame. Ford changed some things around the front cross member in 1952 when the new OHV six cylinder engine replaced the previous flathead 6 offering. Depending on what you are doing a 48-51 frame would work as a replacement.
Be aware that the serial number for your truck is on the frame, not on the cab or any other part of the truck. Something to consider if your title matches your frame.