Need help trying to find front end part numbers!!

I was recently in an accident and the front end of my 1991 Buick Regal custom is smashed. I'm trying to find a new hood, headlight assemblies, radiator, hood latch, and grille assembly. I am having trouble finding stock part numbers so that i can cross referance them with oldsmobile to see which fits this car. Because none of the junk yards have this style Buick. Thanks.

Many of the body panels for your year car have been discontinued by GM. To get part numbers, we also need to know if it's a 2-door or a 4-door, as many of the parts are different.