Hello Messerschmidt59,
I could be wrong but I believe CFS1_RAF662_AVROLANCASTER_V.zip is a typo made by Ross McLennan in the Readme .txt file.
The file you require is CFS1-RAF662_AvroLancaster-V2.5.ZIP by Roger Lowery and should be still available if you hunt around. If you still can't find it let me know and I will be glad to help.
Regards
AvroCommander.