I just did this, and it was a major pain in the ass. I have the same tail. First, I carefully cut the hole out for the tail light and then carefully sanded until I had a perfect fit. While doing this, I decided it was too much of a pain to do the turn signals and just used an integrated tail light from Pashnit. I used the OEM brackets on the tail light and made custom mounts out of L brackets from Lowes. Here is a picture I took. I kept breaking the rear ones out no matter what epoxy I used. I ended up changing the custom style to match the ones toward the front and got some cat hair fiberglass repair from the auto parts store. I put it over the brackets to help hold them to the fiberglass, and have not had another problem.
THis forum will not accept JPGs if the extension is in caps darnit....