hey guys I need the numbers for the u joints on a 97 2500 4x4 front shaft.I know the 2 close to the case are the same,but Im having a hard time finding one for the front

http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=470&LineCode=NUJ&PartNumber=2151309&Description=Universal+Joint+(U-Joint)+-+Front+Driveshaft+at+Front+Axle