Where can I find a new nose/bumper for my Camaro Z28 that will fit CORRECTLY?

On a 95 Pontiac Firebird I bought it had a new nose/front bumper because the girl who owned it smashed into something apparently. The problem is that it doesn't fit correctly and theres huge gaps between the hood and the nose. I'm not sure if this was because it was a bad after market piece that didn't fit right, or if it was common carelessness by a body shop. I was wondering if someone could steer me in the right direction to finding a piece for my 1994 Camaro Z28 that WILL FIT PROPERLY and not stick out on the sides. I've looked all over the internet and theres many shops that sell them for different prices but I want the best and I was wondering where I could find a good one because I'm sick of getting these cheap *** parts that leave the car looking like it was put together poorly. Can I order it directly from GM still or no?