This guy was using his noggin for something other than a hat rack! http://forums.nasioc.com/forums/showthread.php?t=938951&highlight=corner+markers
the only problem with that is the JDM fenders are recessed where the turn signal is so it will look different since it will stick out farther.
just depends on if that bothers you or not, but they seem to be popular on various sites such as subydude and optionimports. I do see where that sti in the thread has indented fenders but its not that bad without the indention I don't think.
This is the link you need to install the JDM sidemarkers. http://speerschong.com/ron/sti/sidemarkers/
jsut for refrence this is a hard diy to get right. its very easy to over nibble the whole. then you got loose lights in your fender.