those are two totally different spoilers. the "edge" style is commonly refferred to as the "Xtreme" style on sites like VIS Racing and stuff... the other white silvia you have on the bottom is in fact a NISMO 270 R replica. that wing can be found on VIS racing as the "Techno R" wing. the nismo wing isn't the wing you are looking for... its the "Xtreme" style that you want. check out
www.visracing.com for more info. there are other places but i am 100% sure they have what you are lookng for. hope this helps
-terry