How do I find clips and screws for my vehicle

So my car suffered some front end damage, I ordered a new bumper cover headlights and much more but, as expected, they didn't come with screws, clips etc. The original parts were completely lost in the wreck. How can I find what screws, bolts and clips I need to put my car back together?

The car is a 2002 Nissan sentra GXE sedan.

I need help here guys. Thanks in advance.

Try a Google search for "nissan parts" minus the quotation marks. You should find a bunch of online sites with diagrams and part numbers for pretty much everything you'll need. Then you can use those part numbers to find the best prices online, or simply take them to the dealership to order them there.

I'd highly recommend checking the location of each site, if you shop online. Some might have cheaper prices, but the shipping could far outweight any "savings." Of course, also check out reviews online for sites. Stuff like them screwing up orders, taking forever to ship products, or horrible customer service.

Try a local auto body paint/ supply store. Awhile back I walked into one and was surprised to see an entire wall covered in weirdo body fasteners, clips, this and that.

Thanks for the help guys. I have a turn signal that was completely destroyed. Only thing left is the three wires. I can't seem to find the (I guess) "female" part of the connector. Any suggestions?

Nvm, I found it. Thanks.