Nismo Oil/Rad cap
Nice to discover someone else doesn't have money to burn, I too felt £80(ish) was a bit steep, go and have a look at
www.japanparts.com, (sorry, dunno how to do that link thing) have a rummage about, you'll find the Oil cap for £51.23, Rad cap for £20.18 and the fuel cover, if ya want it for £32.60, you'll need to convert from Yen, and don't worry too much about shipping, i've ordered all that and more, and my shipping was just over £25, but you'll save more than that on the oil cap alone. Hope that helps. Good luck.