Pretty much the reason tac hawks are one piece steel. Making a replacement handle shouldn't have to be an option at the price.
What I have and use, the fiberglass reinforced handles work. What I see on my tools is an overmolding of polymer that finishes out the shape of the handle over the core. The result is less weight, and the handles don't seem to ring or cause me any trouble. The overmolded ones are the standard in professional tools around here. Nupla makes a good replacement.
That's a bit different than a fiberglass handle with the layers on the outside, I've seen those broken exposing the hollow core.
One of the major problems with modern wood handles is that they are simply cut out of larger wood stock with a complete indifference to how the grain runs. Like a baseball bat, it makes a difference, plus the open end grain sucks up water and they age much more quickly if left outdoors. In the day, a handle was fashioned by selecting a piece from much smaller stock that had concentric rings to the core. That makes the handle much stronger as you are using it with a grain pattern that complements the work, not cut cross grain leaving a weak spot. It's a lot like wood rifle stocks - check the grain at the wrist, the stockmaker goes to some effort to get it right at it's weakest point in the shape. Mass tool makers don't care. Making a handle out of smaller piece of wood naturally shaped to what was needed seems standard on old tools.
When I do pick out a wood handled tool I spend twice as much time on the handle as the metal. Cosmetic flaws in the steel won't mean a thing after ten minutes of use, but a broken handle after ten minutes is a pain in the keyster. Happened with a brand new brick hammer, I went fiberglass replacement on it and I'll never have to mess with it again. I will beat it into uselessness before I break the handle on it. If you aren't experienced and starting up the learning curve, why buy the cheap wooden handle version just to buy one again?
Wood has it's place in tools and can be long lasting if the maker exercised due diligence in it's making. When you are on the clock with your free time or on the job, tho, a broken tool is a set back.