I don't have any experience with aftermarket tops, but I am rather **** about my ZR so I personally would only go with OEM for something like this.

 

Someone cut the top on my ZR. I went by a upholstry shop and got an estimate for a non-OEM top. The thing to do is get 2 estimates. Get one from a Nissan dealer and one from a local shop. Give the higher estimate to your insurance company as that way you get the deductable (if you have a one). I then called my insurance company and they covered it minus the deductable. Then go with the local shop and pocket the difference.

 

Wow, that sucks... try ebay... if not the price is high enough to go through insurance?