I'm a sewing contractor with my own factory. I'm currently in the process of creating my own prototype for an all in 1 laptop/keyboard/peripherals bag. A single strap with a buckle in the middle that can be rebuckled to the bag to make it a double strap hand bag, satchel style with a window under the satchel. The upside to the design is that it's also great just for keyboards if you dont want to use the laptop spot, as the dividers will have elastic in them. That way it can just be a keyboard(s)/peripherals bag that can now hold up to 3-4 keyboards/mice/keycaps/tools and tons more instead of a laptop and 2 keyboards.
It's still in blueprints, but i have plenty of pre-made prototypes from previous bags in this style made for other customers. If you have any ideas you'd like to add to this design, look through the forums for my big thread on the subject. It's going to be pretty customizable with your choice of textiles and grommet, stitching, & buckle colors.