I bought this saw used and need to replace the fence adjustment knob, P/N 980953-001, but according to searspartsdirect.com, the part is no longer available. Where can I locate a replacement part that is compatible. I notice that a similar part is available for the Craftsman table saw Model 113.299410. The part number for the "knob mic adj" is 824355 for that saw. Please advise. Curtis Williams - cdwill@sbcglobal.net