If you want oem quality, buy one from the classifieds. I see them sell for 150-200 shipped all the time. As far as I know too, aftermarket ss spoilers, at least some of them, do not utilize the slp ss third brake light. It's a similar one but it's bigger. Just post a WTB ad in the classifieds and I bet you'll snag one up cheap. Aftermarket parts never fit like oem, usually without a lot of body work.
Just another slow H/C/I garage queen