How is it broken ?. If its the block cant you "super glue" it. I was thinking of making new ones but I havn't had the time. Can you send a photo to my e-mail.
I broke mine in the same way and was charged £50 for a replacement pair from a breakers yard! Rip off I know, but its all about supply and demand I guess.
Anyway, I have a spare one, PM me and you can have it for free.
£50 for a pair of clips sounds like a ripoff. Hernley only charged £12 for one clip which was fitted as part of other stuff beening done. I would have thought a breakers yard would be really cheap - especially as they wouldn't have fitted them - or am I just being really naiive.....
I will get hold of my contact and see if they can make some up. I am assuming alloy is preferential? If so I will make sure they are anodized as that makes them harder. Black acceptable?