You have two choices. First, if you have the ability to slit in line on your sheeter consider purchasing wider rolls and run two piles across the sheeter. You should buy your rolls wide enough for double width and an additional ¾” to allow for a slight edge trim on both sides to insure accurate width.
Another approach, if you have two roll stands, is to stagger the rolls across the width of the sheeter. In this way, you can run the two webs side by side without the need of taking an edge trim.