clear corners has a set that is high intensity LED retrofits that are nice as shit, and look stock, if thats what you're going for.
http://clearcorners.com/products/nissan/240sx2/r_led2/Image03.jpg
ifxfi (or something along those lines) is Mike from clearcorners, so i'm sure he can tell you more about them.
I personally think they're rad as shit.