Wedge has made a high fidelity Kilrathi insignia that he would like to share. It's an accurate representation of the "Kiranka Claw" first introduced in Wing Commander 3. You can also download the source .svg file here. Bob made some Confed counterparts a while back as well.
I think I have been quite faithful to the design as it appears in the Warbirds document from WC3, but I appreciate comments and constructive feedback all the same.