How rare are these beds? I have been looking for one for my 1959 f350 SRW.
Any leads would be great. I don't want to shorten my wheelbase for a 8ft. bed.

 

Off the top of my head....

I'd say you've got a long search in front of you as most of the longer chassis had a flat bed or other specialized bed on them. My guess is that there was only a small number produced with the 9' bed.
The Colonel or Number Dummy might have some production figures.

Keep your eyes peeled in peoples backyards and in the paper, there's alot of old beds that have been turned into trailers and you might get lucky and spot one.

Good luck
Bobby