Billykirk do a range of bags. I'm not sure what would fit your needs.
Whilst trying to find this brand (I forgot about it last night), I stumbled across the J Panther Luggage Courier Ruc, which looks quite nice.
Whilst trying to find this brand (I forgot about it last night), I stumbled across the J Panther Luggage Courier Ruc, which looks quite nice.