Theres a very simple way to rehandle blades like this where you can't / don't want to drill the tang but it's too thick for a standard handle construction.
Get a sheet of vulcanized fibre (or thin strip of hardwood) the same thickness as the tang, lay the tang on the sheet and trace around it.
Cut out the tang shape
get 2 scales of nice wood
Epoxy the vulc. fibre & blade onto one scale & clamp until set
When set, epoxy the other scale on making sure all voids are filled and clamp up again nice and tight (not too tight!)
When dry, use a belt sander to shape the handle
Job done - a very solid and nice looking knife.
I've got one I made this way kicking about, I'll try to find a pic.
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