I've made both sgian dubhs, and sgian brews with antler handles. As stated before, a good quality epoxy works well. When it comes to fittings, I've most often poured a pewter bolster and pommel for the pieces. It's a fairly simple procedure, first I drill and then carve a decorative notch into the handle to hold the pewter in place, then I just tape a heavy paper or sometimes aluminum (soda cans work well) dam in place around the handle and pour the pewter. It cleans up easily with files and sandpaper and can be polished to look like silver (for a while at least).