Here is a link to to a site online that has online manuals for the Concept 30s (
http://www.concept30.co.uk/). You didn't mention which model you have so I can't help you with part numbers but you will find them in the manual that goes with your model of Concept 30. Ebay is the place I get my parts there are usually several parts listed. Buy spares of everything if you want to keep your Concept 30 because you are going to need them sometime and the parts are getting harder and harder to find.