My apologies,
It looks like the blade below but has a half circle with the prongs on the tip og the blade.
http://www.torhead.com/item/aYhpXBc/custom-built-vibrosword#screenshots;view:14652
One problem is that it is easy to locate these for companion as they can use "techblades" not "vibroswords" (*** is that anyways?!) or they have a requirement of being that companion in order to equip.