Any one after the 48th Airfix B.2 Canberra, B.57 Canberra and 72nd nimrod they are knocking them out for £15ish each
http://www.airfix.com/airfix-products/a ... 48-a10102/
http://www.airfix.com/airfix-products/a ... 48-a10104/
http://www.airfix.com/airfix-products/a ... 72-a12050/
Ive picked up both the Canberra's and was seriously thinking of getting a 3rd 'rod but I thought better of it
