I still needed a waterproofish way to mount them, so worked out a way to use transparent CD plastic envelopes, hole punched and bound together with cable ties, and trimmed each section of route sheet to fit inside them - I then mounted them using elastic bands that held them bent over the top of my front light -
As a newbie who doesn't own a GPS I'm interested to know how other people mount their routecards.
So far I have improvised a mount from a stiff plastic envelope that was originally a name card holder. It has survived 3 audaxes but I doubt it will survive many more. So - what next?
Actually, now I have re-read bikey mikey's suggestion and realised that he means the soft plactic cases, not the hard boxes (I know, I know, but I was up at 0400 today) I think that will probably do for me but I'm still interested.