Based on this product's specifications, here are some alternatives and similar models
Briefcase Addison 306014 laptop case 35.8 cm (14.1") Black, Oxford 900D, 12–20 L, 380×25×260 mm notebook compartment
Summary description:
Addison 306014 is a unisex briefcase-style laptop case designed for devices up to 35.8 cm (14.1"). Constructed from Oxford 900D polyester/nylon blend, it provides drop, shock and water resistance. Features include a padded notebook compartment (380×25×260 mm), tablet pocket, front and back pockets, pen holder, USB port, zipper closure, shoulder strap and expandability from 12 L to 20 L. Weight 720 g.