The bracket looks to have been dropped, the tank is still available. Have JK got any? I`m sure they had OE ones according to their catalogue.
If you can get a later type one, then you`ll have to make it fit, one of the joys of having 20 year old vehicles, you can`t expect stuff to be available off the shelf any more

I wouldn`t be bothered with buying a second-hand one, any of those will also be 20 years old and suffering

Keep it real.
Search first - ask second ;>}