Kawasaki Z1000 American Import

Hi all
HELP!! CAN ANYBODY PLEASE HELP

I have a z1000, which for parts purposes I need to know the exact year of the bike. I think its around the 1980 model - The rocket boxes are square'ish not round. It's an American import where it was I believe originally registered and could well have been made in the American Kawasaki factory, so may have been registered in the uk after actual manuafacture. It is now a 'V ' registered UK number plate.
The engine serial number is : ZT00AE109737
The Steering Column Number is: KZ 10 B 534 306

Just to give you a heads up, the problem i'm having is with the carburetors ( Mikuni - excuse spelling if wrong). So in addition if anyone can guide me to somewhere I can get a new or reconditioned set of carbs that would be great.
Thank in advance for any help you can give.
All the best
Suzy