Time to think outside the box a bit. What type of light? Do you want the light bezel down? Are you willing to send a light to a maker to have a custom mold made, or willing to buy another light?
Now, if you want the best, check this system out.
The Malabar Front
This pouch attaches to their other pouches. So you can mix and match what you need.
The Malabar Front
Go here to see what pouch you want. Single, double, quad pack or a combo of them. The light pouch will attach directly to the front of it.