a few schools of thought.
my current regulator setup uses a 32" on the left which crosses over to the right side and is on a suicide strap, and a 9' hose on the right that crosses over to the left and gets clipped off *Poseidon Jetstreams*. The right hose will remain tucked until I am situated horizontally in the water so it has to come straight up.
Those I know that use a left handed regulator on the left side, or a right handed regulator on the right side and choose not to cross them all use long or "long" hoses on those sides. Typically 40", 60", 84", or in my case 108". These will go down into hose retainers, then back up to the mouth. This allows you to adjust the hose length on the fly which is important when you have no slack adjustment so the hose has to go somewhere.
Lamar likes his long hose on the left, which most people aren't a fan of, but in order to prevent crossing under a diver when in a single file air share, you should have the the long hose on the same side of your body as the hose connection on the second stage. I.e. a reversed second stage with a long hose should be on your left. What it sounds like you are wanting to do is 2x his short hose or in this case, right bottle. If you are diving with two short hoses, and they aren't crossing behind your head, there is no reason that they can't both be on individual suicide straps as long as they pull out pretty easily.
This is also pretty similar to the Toddy Style system where all of their bottles are set up exactly the same. In your case you would just have the left bottle be a true mirror image of the right bottle