like the Hartsook and the CRKT Ritter...there are several one piece "neck knives" that would be sturdier...

ESEE Izula
Newt Livesay Woo
CRKT stiff kiss
Camillus ArcLite

possibly a "kit" knife without the handle scales from Jantz or other kit supplier

If you can find a dealer with a Blue Ridge catalog, they often have clearances on pretty good stuff