grahamjc
Well-Known Forum User
JDM fender mirrors - Japan. Yahoo Auctions Japan (via a proxy bidding service like Buyee, BidJDM,etc.). They also sometimes come up on eBay US and UK - chrome only though as the original black are hard to get. Get some chrome, scuff-sand, and respray.
Bumpers - stainless steel repros can be had from eBay or here: http://www.groupharrington.com/en/part/36/datsun-240z-and-260z-bumpers.html
For cheaper originals, someone in the club might be able to help out. (I'd buy the stainless ones tbh)
Front valance and arch flares - talk to Mr. F on the forum (Mike Feeney, MJP Eastern Auto)
Hope that helps.
Of course that helps thanks!