howdy.
that's gonna be hard. not sure what membership level ya need to place a post in the wtb section. same with maybe placing a signature asking for what your looking for so as ya post people might see it. ya might need a paid membership to do those two things I can't remember.
ya can hunt ebay and Google searches, which im sure youve done already a bunch. your best bet is for ya to find a full knife version for sale on ebay, in the for sale forums here, etc and salvage parts from your knife.......
good luck on the hunt.....