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I would call or go to the local chevy body shop and they should be able to answer pretty quickly. Or go to one of these online vendors that I just googled to see if the part is the same or different.
I noticed on one of the sites it doesn't breakout coupe or vert but does ask what model for fitment. It seems that all the models use the same fitment but when I click z51 it said doesn't fit. This will at least get you started@