As jonnoo said, weld it up, a bit of plate and bog, she'll be as good as new.
But, if you're talking about the aerial itself, then you can get ones that mount under the 'a' pillar cover/under the dash, or ones that stick on the windows etc... Google them...
Do you live in a major city? You can get under-dash antennas but they can be sketchy.
My VY Berlina Build Thread - Mainly Stereo
You can get a 20 or 50 cent coin, weld it into the hole and BAM! Shaved antenna!
I'm pretty sure walsey had it done on his caprice.
OKay, Thanks, Ill drop him a text
the stealth one takes a power wire from the antenna trigger on headunit, one wire for earth, and plugs into normal antenna socket. i think it has the option to hook to rear demister aswell, but ours is just in the dash(under the center grille section on vk dash)
Is the "antenna up" wire white? and the blue antenna down?
Not sure if helpful or even relevant, but my wife's cruze does not have ANY aerials on it yet the radio works great. So there must be some sort of internal antenna components you could get.
That way you can weld the hole and install one that is internal and thus no antenna's anywhere visible.
Sorry I can't give more details, but just and idea.
i think you might have the wrong thread
I put the dna aerial booster in mine yesterday, works good. Just dont buddle the excess cord together....