I'd watch the bay like a hawk, if I'm not mistaken you can get alerts when say western knives pop up.
These combos are a novel idea for a compact game processing set, but even the full tang separate knife and hatchet combos like the one I have from Imperial don't male good hatchets. They're basically a hatchet shaped cleavers. I use mine for quick stock removal when whittling.
I wish you luck in your search and hope you only want it to collect .