If you find some let me know! I wrecked one of mine on my 40 series the other week and I cant find any anywhere.
The lady at the bolt shop thinks they are 12x1.25 but I wasnt convinced. She didnt inspire me with confidence!
Again I'm talking 40 series but they are the same brand as the picture you put up so they might be the same size.
Let me know how you go!