Petrolfour, perhaps they don't look like the originals due to trademarking.
In the strictest sense there is a copyright issue, however Fairey as that entity with its trading name and associated registered trademark is not active. I've not looked, yet I'd be surprised if the mark is still registered. Iif it is, (WFEL still use the wings mark) can't see they'll waste time/ money chasing us for cleaning-up stickers. But maybe.
My point:
Our 'stamping' radiator-grill ovals are 'old skool' and clearly not done with CAD/CAM. You can see it. Done by a highly skilled tool-maker back in the day, and not CAD/CAM.
From roughly the mid 80s the method to produce such stickers would use software. 60s/70s/early 80s era stuff would use paste-up.
Software alone leaves the result too precise. Done by hand, 60s/70s/mid 80s era paste-up by it's very nature is never truly precise, thus to produce it via software, you'd make the effort to put in one-or-two imperfections. If it's perfect, it cannot be original.
Paste-up has a 'look'. I'm old enough to be very familiar with both methods. If in production, no attempt to reproduce that 'look' gets put in, and it's not difficult... it's lazy and a clear sign of the use of software.
This is why it's possible to see 60s/70s/80s paste-up against sloppy reproductions with Adobe Illustrator. Hence the audit trail in the reproduction.
Likely the software operator is too young to have experience with paste-up, it's usually the fresh out of college staffer that does this in the print industry, thus doesn't understand what it is he/she is trying to reproduce.
These stickers - If too perfect, cannot be original.