eBay will have hundreds probably! I think you can get different lengths of shank, so obviously the longer the more severe. Can't think of anything else apart from that
I'm really surprised at that but just looked and there are only 8. When we bought one a couple of years ago there were literally 150/200. Probably fashion...!
I just bought one off eBay and it arrived today lovely and soft leather with fluffy noseband cost £30 Inc postage I think the seller was jaks or something like that I think they had a few for sale