Welcome to the forums dude. I couldn't help to notice that you want to go S15. Well, I wanted to do the same to my car, but I think I'm just going to slap on my s13 silvia front end with aero bumper and headlight bricks. I say this cause I had bought an OEM s15 bumper and also have the fog lights that I would like to get rid off. So, if you ever need the bumper and want OEM, shoot me an email.
Again, welcome to this forum dude.

 

We are planning to go aftermarket (Origin Probably) since it will be a show car and race car