There is a bell Styrofoam ball on Craft King. 2 3/8 bt 2 3/8 I don't know if this will work because I do not know the size of the form needed. I just doubled checked and they have other sizes. Hope this helps.
Annie's Customer Service
Janice - We do now have the styrofoam bells in stock (product #144790) and the bells can be found underneath the pattern product description.