If you have the CAD file you can get one made at Fixtiv. I have used them for one off custom machine parts. They do a good job and they are quick. I had them make me a "T" slot adapter that fits into the slider slot for my slider so I can use standard 3/8x3/4 "T" miter accessories. They charge me like 200.00 and that included shipping from China.?
Steven S