Looking for my old car with plate #

[Mystic46]

I had a car back in 1999-2000 and my parents sold it when I was a teenager on me and I can't find ut. It was sold in st. Louis missouri at the gateway auto sales. It was a 1990 mustang gt 25th anniversary. The drivers license facility told me the can't go back that far and find it.
My plate number was BKBLK50. if anyone can help that would be awsome and thanks!

[Mystic46]

No one knows how to find a car on here, someone please help

[Mystic46]

Ok thanks