HOW DO YOU REPAIR A SEATBELT THAT A MOUSE HAS CHEWED HALF WAY THROUGH ?

I HAVE A SUSUKI 2005 XL-7 AND ON MY RIGHT REAR (2ND ROW SEATS) A MOUSE HAD CHEWED HALFWAY THROUGH MY SEAT BELT. I WAS WONDERING IF IT IS POSSIBLE TO REPAIR BY REPLACING THE WEBBING OR JUST TO GET ANOTHER SEATBELT AND IF SO WHERE WOULD I GO TO GET THE LEAST EXPENSIVE AND BEST VALUE FOR THE BUCK FOR A SEATBELT . THANKS I AM OPEN FOR ADVICE.