rear bumper got burned

a bad mistake i made last week, after using the jump-start i put the booster in the back trunk, when i was driving the car the plug got loose and the positive touched negative and made fire, my trunk got burned so is my rear bumper, now i took the car to a body shop ask them to fix it, but they said the 4 door integra rear bumper is hard to find and must buy a new one. Now my question is what bumper should i go? i dont need things too fancy, i lost the passion modifying cars, but this is a opportunity i can do something bout my car. Where to get a rear bumper online? i lowered by car with h&r spring and koni yellow, and that's about it. everything else is stock except the air intake. so i dont think a bodykit sort of bumper would fit in my situation. am i stuck with the stock bumper? or there are else options i have? the body guy said if he order it for me it would cost $280. plz imput ur suggestions. thanks. and please dont make the same mistake i made, its a terrifying experience!! :disappoin

what year is your integra?