I've not seen an official one on the T6/T6.1
Having a drawer makes so much more sense designwise, other than the bench seat would stop it opening/ mean the drawer could only be part of the length.
Ive removed the gas struts from our T6 hinged lid, that frees up internal space and means the lid opens fully.
At some point I'm going to replace the whole thing or at least add drawers to the bit that isn't obstructed by the bench. As many have said the storage bench is a poor afterthought done on a Friday afternoon by a first week apprentice.