Female to male steelhead

My neighbor saw the barracuda I posted the other day and wanted me to repaint his steelhead replica he had done like 13 years ago. I won't post pics of the before, I think it would be disrespectful. Suffice it to say, I doubt whoever did this had not only never seen a steelhead, I doubt he/she had ever seen a PICTURE of one. He's from the south so, it is what it is. He caught it in Lake Erie or Lake Ontario, (two lakes in which I've caught steelies). He also wants me to alter it from female to male. I'm not sure I can do this, without it looking ridiculous. Any ideas? If it's going to look stupid, I'll tell him I can't do it, and just paint it as is, thanks all.

 

Is it possible to sculpt it? Where could I get the proper head? Thanks man.