Try a Vtech 13100 from New Graham. It's not a direct copy - there are differences, but the majority of the look is there. Liner lock, hard anodized grips, and a TiN treated blade make it a great beater, about $45. Fit and finish is better than some Bucks I've owned.
But it's not a Titanium framelock, and for that you must pay the entry fee. Carrying one on a daily basis for the last 18 months - not a Sebenza, but a Ti framelock - there is no substitute for the way the material handles. Fitted with an S30V blade, it cuts "forever," and almost never needs sharpening.
Knives aren't always about the ergos, materials can make a significant difference. Most cheap copies are just that.