Your other alternative here is to tear your fabric. If you do a rough estimate of say 80 inches from your 5 1/4 yards of fabric - chop that off (roughly 2 1/4 yards). Then make a small snip near your selvege and rip that. THEN measure the width of your border, add maybe an inch, make another small snip and rip. Repeat for each border. Reason for adding a bit of width is tearing does have a tendency to make the edges a bit wavy and you might need to clean that up a bit and the extra inch will give you that wiggle room. Any yardage you have left over from that exercise could then be used for your binding as well before cutting into your leftover yardage. Or, as others have said, piece your borders. Unless there are specific design considerations with the direction of the design in the fabric, etc.