Depending on how big my scraps are I did think maybe the top could be a single piece, with just the side panels being different fabric. It wouldn't have the same look but would be easier.
I have a large quantity of dark blue upholstery fabric so could make the whole thing entirely from that but it rather defeats the purpose.
Also I note on the pattern itself it indicates that it can be closed with velcro instead of a long zip. I think I've got zip that are long enough though in the stash.
They use curtain net to make the inner bag, but I think I donated mine on the basis that I had nicer lace curtains instead and didn't need it. However its worth checking! They don't give a size for the inner bag but I can guesstimate something I am sure.