Have you tried this site?
http://www.partstore.com/ModelDetail.aspx?MfgId=155&ModelID=283729&close=1&exact=1
Have you tried pushing in the knob? Somtimes it will get loose.
http://www.partstore.com/ModelDetail.aspx?MfgId=155&ModelID=283729&close=1&exact=1
Have you tried pushing in the knob? Somtimes it will get loose.