I have a 02 EX with the factory spoiler on the trunk, it was dented, and I was wondering if I could mount the factory spoiler onto a trunk lid of one without. Or would it be better if I just tried to find one that had the factory spoiler?

 

Yes, you can mount it yourself onto a replacement trunk lid. Here are the instructions: https://www.handa-accessories.com/civic/02CIVWING.pdf

If you need a template, just tape a piece of paper over the holes in the dented trunk lid, rub a crayon (or something) over it, and transfer the template to the replacement.

Drill, mount, enjoy.