bed matching

[MDowns]

i have a 2001 3500 and i am currently looking for a dually pick-up bed for it. i was wondering if a 3rd gen box would match up to my frame or if the body curves would even be a close match to my cab. . if anyone has any input it would be greatly appreciated. . also if anyone close to my location(marion co. , ky) knows where i could find a decent bed for a good price (and preferrably red) i would also abbreciate the info