Vise huge screw and vise nut needed

[drivesitfar]

I have a L. M. & V. co. Lowville 6 inch 150 pound vise that is missing the vise nut. the screw is 1.125 inches in diameter and has 4 threads per inch. now i can use a vise nut to fit this screw that is 4 inches long at the base and that will fit this large screw.

or i need a screw and nut combination from a vise and the screw needs to be 27 inches long to operate my dynamic jaw without modifying it.

thanks in advance

PS i'm also looking for huge vise parts in most any brands in case you have a few laying around i'll buy the good parts and pieces.