The problem with rehoming any large fish, is any experienced aquarist knows a rather large tank is needed, and this cuts your prospective group by about 90%, and then anyone who has experience with dovii, will know they usually do not play well with others, and would need to be willing to dedicate a large tank to only that one fish, which drops the takers down another 9% or more.
As an example, a friend of mine runs an aquatic exhibit at a large zoo.
He says at least twice per week someone shows up with a medium large pacu, red tail cat or dovii wanting the zoo to take it, and he can't.
He needs to quarantine anything at least 6 months, and is already at species limits in his 10,000 gallon Amazon display with Pacu, and Red tails.
You may be left with the option of eating it yourself, to put it out of its misery, and before you get bent out of shape by this, I live in Panama, where cichlids are a normal part of the menu. We eat, black belts, peacock bass and Tilapia all the time.
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We have an annual peacock bass jamboree every year to rid Lake Gatun of as many of the invasive species as possible (like the Cichla), so many end up in he pot.
I kept them when I lived in the states, here they are a nuisance.
