Something similar to Eastern indigo?

Hello,

I have recently fallen in love with eastern indigos after meeting one in person at a reptile expo. Unfortunately i dont have 8000+ Dollars to spend on permits xD.

So, I was wondering if there are other large snakes that shared some of the traits the eastern indigos generally have disposition wise. one of the things i noticed most is how responsive to its surroundings it was and how willing it was to check out what was going on.

Any large gentle curious responsive Colubrids out there other than Indigo?

Something alil more attainable?