Check with your department of conservation in your state. My father-in-law just had a pond (that used to be a farm pond) converted into a catfish pond and the Department of Conservation GAVE him all his catfish! Now granted, they weren't adult sized yet... But still! It wouldn't hurt to give them a call and ask about conservation grants or fish transplanting.
...and on that day when my strength is failing, the end draws near and my times has come, still my soul will sing Your praise unending, ten thousand years and then forevermore!