Hello Paul,
Thank you for the additional information.
The Sortable widget does not support the functionality you are looking for and is not intended to be used in such scenarios. I am afraid that we cannot offer a build-in solution (widget) that you can use to replicate the site you referenced. My suggestion is to try developing a custom reordering logic using the Kendo Drag'n'Drop components which will provide drag and drop events and hint functionality.
Regards,
Alexander Valchev
Telerik
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