script that can copy and paste all items on each page 8.5" to the right

Hi ​@rpriz , Are the page items on the left side really at exactly 0,0 X,Y? If they are this might work—there’s no error checking:

var p = app.activeDocument.pages.everyItem().getElements()
var pi
for (var i = 0; i < p.length; i++){
    pi = p[i].allPageItems
    for (var j = 0; j < pi.length; j++){
        if ((pi[j].geometricBounds[0] && pi[j].geometricBounds[1]) == 0) {
            pi[j].duplicate([p[i].bounds[3]/2,0])
        } 
    };   
};   

Before and after:

Why not place the PDF on an 8.5x11 setup as facing pages so that the spread (not page) is 11x17?