Have You Seen This Hair Roller?

I am in search of the hair roller shown in the attached photo.  They are plastic, come in various size circumferences and interlock with one another via the edges (one end is broken of the one pictured) so that no pins are needed to secure them.  My hairstylist uses them to wet set my hair, but his have fallen into major disrepair.  As he's long ago discarded the packaging, he's not able to identify this type roller by name or to locate where to purchase them.

 

Any help you---or someone you may know--- can provide us would be immensely appreciated.

 

 

 

 

 

Thanks.

 

Cari