Rather than going through him you should instead go through the Z store since they stock his stuff and will not take your money if the item is not in stock:
Motorsport! 370Z Exterior - The Z Store, Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts
EVO-R will take your money even if an item is not in stock and the responsibility is on you to follow-up with him to ensure that your order is fulfilled