Everything what will be offered , will be recasted sooner or later if it's good or to expensive for the mass.
These guys always will be there.And he could do nothing as look and anger himself, cause he have no licence or patent which would keep this guys on there balls.
If the creator not want this, he should not offer his casts and keep them only for himself.
Simple as easy.
But i agree it would be a great shame if this will happen, for all who want to have such a nice replica of a real helmet.
My personal POV:
I think he can sell them for more as 300 GBP and there will be enough who would buy it.
Look how many guys buy EFX or MR stuff, it's not less expensive but the people buy it like candy.
But the risks of recasts would be much higher.
It's something special, which will not will happen again the next 20 years i believe.
And the big point, he's the only one who would sell copy's of a real AnH armor and helmet.
So he can dictate the price, if he want to do this.
But that's all wild guess, so sit back and lets see what will happen.
Overall one more nice replica outthere , which is truly worth it to collect.
He has done a great work so far.