Fuel tank

Heys guys. I am new here since I recently got myself a 79' kz1000 shaft drive and my gas tank has leaks, i am thinking about replacing it... could you please advise me what tanks should I look for and what tanks of kawasaki models are compatible with my bike ? I add a picture with my bike and hope for your help. I am thinkig about a tank from the same model but more round one. Hopefully I am successful with adding a pic of my bike