IMO the '99 Highlanders were as close as they came to a TRD 4Runner since they all had the taller coils,most had the diff lock and of course the hood scoop which could be considered (if they aren't) TRD parts and the '99s are actually not as common as other Sports/Highlanders and only came in black and jade mica. And no '99 Highlanders came with 2wd so they are in a class by themselves.
I wanted to achieve a close to stock look but still make my 4Runner my own and with the TRD Sport stickers I do get asked about them quite a bit.