What about something like Panduit MS4X625X15-LS ? http://www.panduiteeg.com/catalogs/en/ww101n16j-nl/pdfs/sa101n16j-nl.pdf

One of the {if not the original?} producers of a wide variety of basket grips is Hubbell/Kellems http://www.hubbell-wiring.com/tools/tools.htm select “4. Kellems Mesh”