Hello From Miami Florida

How's it going everyone ? Thanks for the add. Hoping to learn a few things on here as I build my first cafe racer out of my 1982 KZ650 CSR. Not my first bike but definitely my first in depth build.
Little bit about myself, I'm a machinist and have always been a car enthusiast. So wrenching and building cars has always been a passion. 

Question I do have is, What aftermarket gas tank, other model KZ, or any make/model bike tank could I swap to give it that cafe racer look ?
I am aware the brackets will need to be modified and to be honest I'm looking for the least amount of work.

On to the photos. First 4 photos is how I bought it and last photo is how it currently sits as I wait on parts.

Welcome from the UK