Okay, there's 4 technologies for the 'problem'-
1: casting- as mentioned before, molds are expensive. And this isn't something most of us are set up to do. Someone wants to do bronze casting for fun, great- but.... not a real answer.
2: Forging- Forging you can do anything, but it might be an awful lot of work to get there from here. $300 and $400 tools, regardless of where you put the hole.
3: forge welding. I'm going to get to this one, it intrigues me.
4: stock removal. For this, with a waterjet or plasma cut blank, you can do a lot in a hurry. even with a bandsaw, you can get a rough profile and make either of the ones I've drawn pretty reasonably.
first, the big one:
and "wrapped"
This ain't small- OAL is about 7.5 inches, with an edge length of 5 measured vertically, 7 measuring the edge around. In this case, you are definitely doing a split haft attachment system. And your 'hammer' end is going to be your stock thickness.
I could handle 1095, but I think this is a design that's going to shine best in 3/16 or 1/4 5160 with an edge quench. And a convex grind, of course. Betcha I could still get a nice shaving edge on that. (Actually wouldn't be that far off from a bushbeater or boar knife)
The choppy line on the thumb ram is actually a one sided jimping. so you still have one sharp cornered flush side for rounded scraping.
For a designated flat pack type thing, I'd do this one in 3/16 5160- it fits into a 3x6 inch rectangle:
cutting edge is still a good 4.25 inches, and in both cases the handle is based on the trail knife handle I do.
Both designs have a flat rear to the blade that can 'rest' on your haft.
Now- forge welding would be a nice answer. You take your basic blade whape out of two chunks of 1/8 1060, put a nice 1/4 inch piece of 1060 in the rear, and put a cutting bit of 1/8 inch 1095 in the middle fo the blade section. weld it all up, then use a drift to round and spread that center hollow section into a goo 5/8 or 3/4 x 2 inch oval. not much more you can ask in that- light weight, handle will be hand filling, and you have a
centered val haft fitting.