GBA Game Collector question

I have a nearly complete Pokemon Emerald, the only thing Im missing is the cardboard insert. My question is, from a collector standpoint does it hurt the value of the game if I were to get a reproduction insert? Does anyone even care about that part, besides it just being there?

You will 100% get people who will demand to know everything is authentic. Does it actually matter? Of course not, it's a fucking cardboard insert. However, I'm not knowledgeable enough in GBA to know if it's obvious or not if that insert is a repro.

Could you use the cardboard insert from another GBA box?

I wouldn't think it could hurt the value vs not having one at all, but this isn't a subject I think about too much.