Dreaming up ways to spend bomber perks, without actually introducing perked bombers worthwhile to spend them on, is just a futile exercise of drowning us in useless rules that only serve to complicate the game.
I have an idea. If you really need to get rid of your bomber perks then just change your name and start at "0" again. Far easier and doesnt weigh the rest of us down with rules.
Or you can model an A-26, a B-29, or both.