Dear mate, I understand your frustration, but I think they will never input that brand.
And I agree with them.
It's very expensive to put one, or two or more engineers, working on a brand that no longer exist. Last car that was product, was in 2006. I thinking. That was 10 years ago.
For me, it's better to put that same engineers to work in the improvement in some other brands, that exist and we need more.
But once again, I understand your frustration and respect it.