funny thats what I was thinking, just looked like some 3mm flat plate. Definitely easy enough to make yourself but I have the far superior series style doors with sliding windows fitted to mine so they are unlikely to get stolen. And as an added bonus i get about 3inches of extra cabin width each side as you don't have the unnecessary and up and down window mechanism!
The optimill hinges are really nice, I’m just not a fan of the spacer blocks which come with them, but from a security perspective they have a unique feature which I won’t disclose on this forum but it’s pretty cool tbh
On a side note if you have old rusty doors which are knackered then I wouldn’t bother though really, it’s a lot of money and they don’t even supply new screws for the mirror arms which I thought was a bit muggy