Have already made one of these but would like to make a sort of weekender tote. This is the normal arrangement of the pieces (I hope)

Click image for larger version.  Name: schlepp bag arrangement 2.jpg  Views: 37  Size: 26.2 KB  ID: 83444

but I want to make it wider. Any maths geniuses (genii?) out there who could explain an arrangement (maybe by adding squares) that would do that. Sort of landscape-y - or am I asking the impossible?