This may be of help to you
_http://www.intellectsystems.co.uk/epages/intellectsystems_co_uk.sf/en_GB/?ObjectPath=/Shops/intellectsystems.co.uk/Categories/Dishes/%22Channel%20Master%22
on that page is a bracket for such a thing-as requard the C120 just try a search on the net for C120 LNB and all will be revealed
