On last thing I would add is to add a notch to the edge of the bottom of the tool where it meets the bushing so it engages with the edge of the metal part of the bushing.
The edge of the metal part of the bushing is like a lip, the notch fits in that lip to keep the tool from moving from side to side and front to back. My first tool was flat on the bottom with no notch, for the second one I had to remake, I put a notch in it and it worked noticeably better, especially when the way the HF press was made I needed to hammer the bushing in slightly to get it in position under the ram of the press. It was hard to hammer it in and get it 100% straight, but the notch caught the lip and straightened it out, while holding the press tool in place.
I can't tell if the Wit's End tools have a notch or not, maybe he can chime in here. If it doesn't have the notch, I hope he can explore the possibility of adding it in the future.
Either way, the cost of his tools is reasonable considering the cost to buy the metal and do the machining and you also support a MUD vendor. It can seem high at first glance for a "one time use tool" but how much would it cost to have a local shop replace the bushings?
Once you figure the cost of repair shop labor the Wit's end tool cost is not unreasonable at all, even for a tool you think you'll use once. With the right press tools and the press, this is a pretty quick job, just don't forget the hearing protection, those suckers can get loud when they finally pop free.