first of all - not a bad looking little knife. i just checked it out, looks handy.
ok, you probably really don't want to have a sheath made because it'll cost you as much as the knife did. so, it'll always feel kind of weird.
here's what i used to do when i was a little kid trying to conceal fixed blades with the stock sheath - stick the sheath IWB, strong side, with the edge forward. fold the loop over the top edge of your jeans so that it becomes a IWB loop. there's probably straps with snaps on 'em, right? these can either be cut off or wrapped around the back of the loop and snapped together.
not sure what your sheath is like, but most of the sheaths included with cheaper knives, this trick'll work on. it does mean you have to draw the knife in reverse grip or you have to practice a funky draw where you slide the back of your hand in between the knife and your body, thumb down.