Do you have a picture of it installed on said 97-99 GT/Outback bumper? What vehicle did it actually come off of? Saying that it "fits the 97-99 GTs and Outbacks, or a JDM bumper" isn't very confidence-inspiring, since the overwhelming majority of JDM bumpers take the low or mid height grilles.
I would be interested if it was actually the "tall" variant, but it looks to me that it's just a painted version of the "mid" one
I've already got that didn't fit right.