The camera body of a 35mm film camera has absolutely nothing to do with how big of a roll of 35mm film you can put in it.
..........
Errr... not really.
Lots of older pro-level 35mm bodies have bulk film back options. 250-frame backs are still available on the used market for both select Nikon and Canon bodies.
What Sparky said.
Apparently, Nikon also made a 750-frame back. Holds and entire 100-foot roll.
Interchangeable Film Backs for Nikon F2 Series Part II
Don't ask me where you'd find one, of course
But yes, a new Nikon film camera can be had, but the backs for bulk film loading would have to be bought used. And not cheaply either, it seems.
And I have to chime in with the others: why does it have to be new with a bulk film back?