The Hay Experts do them
Pets at home do them but they are mixed in with some alfalfa & beetroot balls.
I ordered some a week ago from a seller on Amazon, I couldn't believe my eyes when I searched on there for them and they were 56p a pack!!! I quickly ordered a few packets and they came the other day, exactly the same as the previous ones I have bought from other places. I have just looked on Amazon again and they have put the price up obviously they must have made a mistake pricing them, pleased I got mine before they noticed
wyvale (is that how you spell it) garden centers, they have a pet section with rosewood products in there x