Weel, I don’t know where you use ammonites but in case that I will need one I can knit one myself now ;-)
In order to guard against misunderstandings: I found ammonites always beautiful – even, when they are knitted :)
Links:
Knitted Ammonite (Ammonite (R3))
English Wikipedia entry for ‘Ammonite’
German Wikipedia entry for ‘Ammonit’