Knitking is the same as Brother bulky machines, either KH-260 for the chunky punchcard machine, or KH-270 for the electronic chunky machine. It will be far easier for you to find a part if you look for it by using the name Brother. I guess you are in the USA as they never sold Knitking in the UK. You would have to contact each dealer separately as they delight in never sharing customer queries when they can't help. You will find plenty of Brother dealers on the internet.
Jo
October 2009