I ran across this several years ago and have not seen it on the forum.
Season and fry your fish filets just as you would normally do. Then place them in a smoker at around 100 degrees to keep them warm and smoke them for around 30 minutes with whatevery flavor of smoke you want. It doesn't take long, as they will soak up the smoke in a jiffy. The filets will stay crisp and are a great change of pace.