There are all kinds of alternatives to fresh flower bouquets...
Artificial flower bouquets?
Origami flower bouquets?
Felt flower bouquets?
Or you could not bother with anything resembling a bouquet and go for...
I personally really like the fans although I suppose they aren't really suited to a winter wedding!
Edit: Just seen this and think it looks really cute...
You've still got over 9 months to go, could you not do some charity shop searching for some old books? They wouldn't have to be first editions, etc I wouldn't have thought, just be pretty, oldish looking hardback books?