I have never used it, but you can make chain any size you want, by using an extruded length of gumpaste the diameter you need, wrapping it around a thin rolling pin, or paintbrush handle, or whatever you can find in the size you need, and let it set for about 20 minutes, until slightly dry, formed but still pliable. Then you cut a straight line in it, cutting it into links, in one cut up the side. Then you take each link and link them all together, adding a drop of gum glue to the open sides, and holding them for a couple seconds. If it gets too dry, they will break, since you have to manipulate it a bit. 

I have made many small ones, using two drinking straws taped together for the mold, then cutting up the join to make the links. 

Though that mold may be able to be used if you want your handle to be able to defy gravity, in an upward arc, like it is being held. The links wont allow for that. 

Thanks.