Thread Ninjas.

Im going to pull my nearside and offside front fenders/wing panels off for repairs, and one has already sheared off, i was wondering if anyone on here, happens to know what size bolts and thread pitch hold them in before i get the wing off and none of the fixings out due to seizing. I dont have access to the car for another month, so its not being lazy, i just want to order some replacement fasteners in advance. Thanks.