That's a great looking tank, idle0095! I'm glad you're trying to find homes for those pacus. If you don't have any luck with the zoos or aquariums, you may try pet stores. Some people have huge aquariums or even ponds that will accommodate such large fish, though it is rare.
I'd also keep an eye on the veriegated leafy plant in the back, right-hand corner by the intake for your Cascade filter. They are a type of Dracaena and are not a true aquatic plant. With huge Oscars and Pacus I don't know that they'll have a huge impact on the water quality, but you may want them to yank them out once they start rotting.
Again, a very good looking aquarium. And good luck with your new reef tank. That is sure to be a monumental and fulfilling undertaking.