Just noticed there are a good selection of Zalora backpacks (about 20 styles) from The Iconic. They look really nice from photos, not sure about quality though.
Nylon Backpack With Leather Trim Dark Grey $20.99 (Was $69.95)
Canvas Backpack with Leather Trim $20.99 (Was $69.95)
Square Shaped Canvas Backpack Black $16.49 (Was $54.95)
To see all on sale backpacks sorted by best discount:
http://fashionlane.com.au/?storeId=2&genderCode=MEN&category…
The actual theiconic link (that's not OP's website)
http://www.theiconic.com.au/mens-zalora-accessories/?page=1&…
Prices range from $16.49 to $20.99.