cost me $500 to get the holes welded up and the boot lid resprayed. And that was in a different colour to my car, matching it was a bit more.. I ran around with silver duct tape on my silver boot lid for ages, but most ppl just run the rubber grommets.

It will cost you $400 for a gx bootlid, unpainted from Subaru. Good luck finding one second hand.

I don't have a high-mount brake light in mine either, but it is on my "things to do list"