Bug 31698 added the ability to move a bib-level hold to a new target biblio, but requires to user to enter the biblionumber of the new target. In Bug 41124 I've suggested adding a catalog search to the workflow of moving a hold to a new bib. As an alternative (possibly simpler) option, it would be good to allow the user to enter an item barcode rather than a biblionumber. The hold would be moved to the biblio to which the item is attached.