[Aviography]

Try this place http://www.spoilerlights.com/servlet/StoreFront

I've not used them, but I've looked around on their site in the past.

 

[Aviography]

Thanks Avio, now what about actually replacing it. I know there's two screws underneath the light, is it as simple as just removing the screws and sliding it out?

It should be pretty straightforward, you will need to look at the images the site provided to verify with the one you remove from your spoiler for dimensions, fitting/mounting features etc.

You will likely have to do the wire splicing again as the aftermarket one likely does not use the OEM connector, my spoiler wasn't OEM either and I can see wiring splice for the power connection.