Yep, that's not a TRD bumper/spoiler, it's a Legana one. Sorry, I see what you mean about you wanting the one with the spots now. You will be able to get fibreglass replicas off eBay. If you want a genuine one it'll be a lot harder, and you'll probably need to look at Japanese auction sites.
TRD rear and side skirts are available from Toyota/Lexus dealers, or then again of course there's eBay.