I apologise in advance if this has been mentioned before, (I could not find owt), but GF have a list on their website of of all models produced up until the end of 2012.
http://bachmann.co.uk/pdfs/farish_products_by_item_no_rev5.pdf (http://bachmann.co.uk/pdfs/farish_products_by_item_no_rev5.pdf)