I have Craftsman 10in. Table Saw Model No. 137.248850. I am trying to find bars to fit in the Miter Channels. I want to use them to make sliding jigs. The problem is that the miter slot is not the standard 3/4" size but is about 5/16" thick and about 5/8" wide type channel. I have search google and have found nothing. Does anyone know where I can order these jig bars?