I have a Sjobergs woodworking bench I purchased about 15 years ago. The bench is set for a right-handed worker with the front vise on the left and the side vise on the right of the bench. Current Sjobergs benches come equipped with threaded holes for the vise screw on both sides of the bench allowing left-handed workers to change the position of the vises. My bench looks like the NordicPlus model with the exception that my bench only has holes for placing the vise at the left in the front, and at the right on the side. The measurements of the bench are 61 x 20 x 33/4 inches. The diameter of the screw is 20 mm. the screw of the vice engages in a metal threaded insert that is attached to the body of the bench. I am trying to get the part from Sjobergs, but I had no success so far. Does anybodyknow where I can get the threaded inserts?