Are you looking specifically for Dior satchels and messengers, or just from any designer? And were you looking for bags that can fit a laptop?
Dior has a number of bags that can be used for the office and can be worn cross-body, like the Diorever, Diorissimo, Be Dior, Lady Dior, and Diorama. Of these, the Diorever, Diorissimo, Be Dior, and large Lady Dior can fit a netbook.
As for tote-style bags, the Dior Open Bar and Dior Ultra are great working bags, and can fit quite a lot. The Open Bar comes with a detachable shoulder strap too.