FYI Blueberry arowana are young silver arowanas that are tattooed. The process damages them and they often die premature to a non altered fish and the dye fades away quickly so it will not keep it, even if the fish lives for any length of time
If you are still serious about getting one though... You can usually find them online.
I have a few different ornates I can part with. Pm me if interested and I can go over the few that I am looking to move