I would still prefer a genuine wing to a replica. I know body parts are hard to spot a fake with but it's that satisfaction that you have the real deal imho.
I have thought about this sort of thing a bit and decided that it is better to save and get the real deal.
I would feel like a bit of a loser if I was trying to pass off a fake as the real deal.
Now I agree to an extent but say the J's Racing Type V bonnet I have, that thing is like £1500 and Aerokit do one that looks just as good for £500. If my £500 bonnet gets chipped or vandalised I'm annoyed but not as much as I am for my J's. Touch wood it's not happened yet but it's the first car I've had that gains a bit too much attention, but that's my fault for ricing it up.
I personally feel no satisfaction about my bonnet, maybe it's because I got it second hand I don't know, all I know is I paid £500 for something that cost the owner 1k more a year ago.
That said the Aerokit bonnet is made from scratch as per all their products, they are clearly alternatives that are similar to others but not direct copies ala Tegiwa everything.