Not sure about 1.8m units (it may be that this size is a bit too small for all regions down to the coast)
Prodelin have a set of receive only dishes for receive only application (the 1183 and 1252 series)
The 1252 is a three piece 2.4m antenna and to buy it in the UK would work out at approximately £650 Plus tax, but its advantage is that the dish pieces will fit into a car. The 1183 is a single piece dish and you would have trouble fitting it onto a roof-rack, let alone Eurotunnel allowing it on their trains (travelling more than 40 MPH may also cause some concern if its not tied down tight)