I know I'm digging up an old topic, but just some quick updates:-
The black Firbird is now in KHI for sure, saw it a few days ago,
The Black stealth with the Lahore number is also back in khi I saw the two on the same day, Good day for me 
The Stealth I often question about is a Blue/Greeen Beautiful colored one that @ Storm has mentioned, it was brought in in 94, then sold to MIDJAC as Storm mentioned I was however unaware that it then exchanged hands again, would love some info on that one stilll. the White C4 corvettte is a mid 90's C4 brought in in 1996 sold to a Lahori in 1998, its now back in KArachi.
Cheers.